diff --git a/services/autorust/codegen/src/cargo_toml.rs b/services/autorust/codegen/src/cargo_toml.rs
index aedb5fca77..abb4a7db4a 100644
--- a/services/autorust/codegen/src/cargo_toml.rs
+++ b/services/autorust/codegen/src/cargo_toml.rs
@@ -25,10 +25,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = {{ path = "../../../sdk/core", version = "0.1.0" }}
+azure_core = {{ path = "../../../sdk/core", version = "0.1.0", default-features = false }}
 serde = {{ version = "1.0", features = ["derive"] }}
 serde_json = "1.0"
-reqwest = {{ version = "0.11", features = ["json"] }}
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -39,7 +38,9 @@ azure_identity = {{ path = "../../../sdk/identity", version = "0.1.0" }}
 tokio = {{ version = "1.0", features = ["macros"] }}
 
 [features]
-default = ["{}"]
+default = ["{}", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "#,
             version, crate_name, default
diff --git a/services/mgmt/activedirectory/Cargo.toml b/services/mgmt/activedirectory/Cargo.toml
index 4509c4f01f..0a328b7ae1 100644
--- a/services/mgmt/activedirectory/Cargo.toml
+++ b/services/mgmt/activedirectory/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-03"]
+default = ["package-2020-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2017-04" = []
 "package-preview-2020-03" = []
diff --git a/services/mgmt/addons/Cargo.toml b/services/mgmt/addons/Cargo.toml
index ff40385e7d..12969b6702 100644
--- a/services/mgmt/addons/Cargo.toml
+++ b/services/mgmt/addons/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-03"]
+default = ["package-2018-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-03" = []
 "package-2017-05" = []
diff --git a/services/mgmt/adhybridhealthservice/Cargo.toml b/services/mgmt/adhybridhealthservice/Cargo.toml
index a4f0dd9ea6..0a96648632 100644
--- a/services/mgmt/adhybridhealthservice/Cargo.toml
+++ b/services/mgmt/adhybridhealthservice/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2014-01"]
+default = ["package-2014-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2014-01" = []
diff --git a/services/mgmt/adp/Cargo.toml b/services/mgmt/adp/Cargo.toml
index 945fcb5ebc..01953096ea 100644
--- a/services/mgmt/adp/Cargo.toml
+++ b/services/mgmt/adp/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-07-01-preview"]
+default = ["package-2020-07-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-07-01-preview" = []
 "package-2021-02-01-preview" = []
diff --git a/services/mgmt/advisor/Cargo.toml b/services/mgmt/advisor/Cargo.toml
index d35faf2f0d..3464204214 100644
--- a/services/mgmt/advisor/Cargo.toml
+++ b/services/mgmt/advisor/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-01"]
+default = ["package-2020-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-07-preview" = []
 "package-2020-01" = []
diff --git a/services/mgmt/agrifood/Cargo.toml b/services/mgmt/agrifood/Cargo.toml
index 534aa1bc77..e7190862e3 100644
--- a/services/mgmt/agrifood/Cargo.toml
+++ b/services/mgmt/agrifood/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-05-12-preview"]
+default = ["package-2020-05-12-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-05-12-preview" = []
diff --git a/services/mgmt/alertsmanagement/Cargo.toml b/services/mgmt/alertsmanagement/Cargo.toml
index 080dc0b132..655310707d 100644
--- a/services/mgmt/alertsmanagement/Cargo.toml
+++ b/services/mgmt/alertsmanagement/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-04-only"]
+default = ["package-2021-04-only", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-08" = []
 "package-2021-04-only" = []
diff --git a/services/mgmt/analysisservices/Cargo.toml b/services/mgmt/analysisservices/Cargo.toml
index 3d2e91aa87..c08c69e892 100644
--- a/services/mgmt/analysisservices/Cargo.toml
+++ b/services/mgmt/analysisservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-08-beta"]
+default = ["package-2017-08-beta", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-08-beta" = []
 "package-2017-07" = []
diff --git a/services/mgmt/apimanagement/Cargo.toml b/services/mgmt/apimanagement/Cargo.toml
index 803d38470d..7870d1b485 100644
--- a/services/mgmt/apimanagement/Cargo.toml
+++ b/services/mgmt/apimanagement/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08"]
+default = ["package-2021-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08" = []
 "package-preview-2021-04" = []
diff --git a/services/mgmt/appconfiguration/Cargo.toml b/services/mgmt/appconfiguration/Cargo.toml
index 267daf1adc..4e5772d1b6 100644
--- a/services/mgmt/appconfiguration/Cargo.toml
+++ b/services/mgmt/appconfiguration/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-06-01"]
+default = ["package-2020-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03-01-preview" = []
 "package-2020-07-01-preview" = []
diff --git a/services/mgmt/applicationinsights/Cargo.toml b/services/mgmt/applicationinsights/Cargo.toml
index fa43498222..2a641a1139 100644
--- a/services/mgmt/applicationinsights/Cargo.toml
+++ b/services/mgmt/applicationinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2021-03-only" = []
diff --git a/services/mgmt/appplatform/Cargo.toml b/services/mgmt/appplatform/Cargo.toml
index 065b9be6ad..5bf5aaad39 100644
--- a/services/mgmt/appplatform/Cargo.toml
+++ b/services/mgmt/appplatform/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-07"]
+default = ["package-2020-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-09" = []
 "package-preview-2021-06" = []
diff --git a/services/mgmt/arcdata/Cargo.toml b/services/mgmt/arcdata/Cargo.toml
index 62209c89ec..f7453e40bb 100644
--- a/services/mgmt/arcdata/Cargo.toml
+++ b/services/mgmt/arcdata/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-11-01"]
+default = ["package-2021-11-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-11-01" = []
 "package-2021-08-01" = []
diff --git a/services/mgmt/attestation/Cargo.toml b/services/mgmt/attestation/Cargo.toml
index 8612c2254d..170cff38d2 100644
--- a/services/mgmt/attestation/Cargo.toml
+++ b/services/mgmt/attestation/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-01"]
+default = ["package-2018-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-01" = []
 "package-2020-10-01" = []
diff --git a/services/mgmt/authorization/Cargo.toml b/services/mgmt/authorization/Cargo.toml
index 5dc9cfe046..3180d084e9 100644
--- a/services/mgmt/authorization/Cargo.toml
+++ b/services/mgmt/authorization/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["profile-hybrid-2020-09-01"]
+default = ["profile-hybrid-2020-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-01-preview-only" = []
 "package-2020-10-01-preview-only" = []
diff --git a/services/mgmt/automanage/Cargo.toml b/services/mgmt/automanage/Cargo.toml
index 5eec3d4c9e..40ef6eb7c6 100644
--- a/services/mgmt/automanage/Cargo.toml
+++ b/services/mgmt/automanage/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-04-30-preview"]
+default = ["package-2021-04-30-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-04-30-preview" = []
 "package-2020-06-30-preview" = []
diff --git a/services/mgmt/automation/Cargo.toml b/services/mgmt/automation/Cargo.toml
index 90c4ca0796..5e7313e795 100644
--- a/services/mgmt/automation/Cargo.toml
+++ b/services/mgmt/automation/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2015-10"]
+default = ["package-2015-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2015-10" = []
 "package-2017-05-preview" = []
diff --git a/services/mgmt/baremetalinfrastructure/Cargo.toml b/services/mgmt/baremetalinfrastructure/Cargo.toml
index 584dbf1e9b..622b36dff0 100644
--- a/services/mgmt/baremetalinfrastructure/Cargo.toml
+++ b/services/mgmt/baremetalinfrastructure/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08-09"]
+default = ["package-2021-08-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-09" = []
 "package-2020-08-06-preview" = []
diff --git a/services/mgmt/batch/Cargo.toml b/services/mgmt/batch/Cargo.toml
index 4b8e7f9298..fa52c3e325 100644
--- a/services/mgmt/batch/Cargo.toml
+++ b/services/mgmt/batch/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06"]
+default = ["package-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06" = []
 "package-2021-01" = []
diff --git a/services/mgmt/billing/Cargo.toml b/services/mgmt/billing/Cargo.toml
index 4da9c49939..017a0b9965 100644
--- a/services/mgmt/billing/Cargo.toml
+++ b/services/mgmt/billing/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2020-05" = []
diff --git a/services/mgmt/blockchain/Cargo.toml b/services/mgmt/blockchain/Cargo.toml
index 51e91c1ecc..496c4f24bb 100644
--- a/services/mgmt/blockchain/Cargo.toml
+++ b/services/mgmt/blockchain/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-06-01-preview"]
+default = ["package-2018-06-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-06-01-preview" = []
diff --git a/services/mgmt/blueprint/Cargo.toml b/services/mgmt/blueprint/Cargo.toml
index 0bfc2db5f7..155ae811a1 100644
--- a/services/mgmt/blueprint/Cargo.toml
+++ b/services/mgmt/blueprint/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-11-preview"]
+default = ["package-2017-11-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-11-preview" = []
 "package-2018-11-preview" = []
diff --git a/services/mgmt/botservice/Cargo.toml b/services/mgmt/botservice/Cargo.toml
index 4946f16d7e..fe33e9b5b8 100644
--- a/services/mgmt/botservice/Cargo.toml
+++ b/services/mgmt/botservice/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03-01"]
+default = ["package-2021-03-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-05" = []
 "package-2021-03-01" = []
diff --git a/services/mgmt/cdn/Cargo.toml b/services/mgmt/cdn/Cargo.toml
index 9a74b8b0db..26fccfff80 100644
--- a/services/mgmt/cdn/Cargo.toml
+++ b/services/mgmt/cdn/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-09"]
+default = ["package-2020-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-09" = []
 "package-2020-04" = []
diff --git a/services/mgmt/changeanalysis/Cargo.toml b/services/mgmt/changeanalysis/Cargo.toml
index 5d3632aec6..c66923ccbd 100644
--- a/services/mgmt/changeanalysis/Cargo.toml
+++ b/services/mgmt/changeanalysis/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-04-01"]
+default = ["package-2021-04-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-04-01-preview" = []
 "package-2021-04-01-preview" = []
diff --git a/services/mgmt/chaos/Cargo.toml b/services/mgmt/chaos/Cargo.toml
index 89f429b5b3..df2f0f2c26 100644
--- a/services/mgmt/chaos/Cargo.toml
+++ b/services/mgmt/chaos/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09-15-preview"]
+default = ["package-2021-09-15-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09-15-preview" = []
diff --git a/services/mgmt/cloudshell/Cargo.toml b/services/mgmt/cloudshell/Cargo.toml
index f33b498fc4..f6df1c3a94 100644
--- a/services/mgmt/cloudshell/Cargo.toml
+++ b/services/mgmt/cloudshell/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-10-01"]
+default = ["package-2018-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-10-01" = []
diff --git a/services/mgmt/cognitiveservices/Cargo.toml b/services/mgmt/cognitiveservices/Cargo.toml
index 7c506c9ff2..983099bb4b 100644
--- a/services/mgmt/cognitiveservices/Cargo.toml
+++ b/services/mgmt/cognitiveservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2021-04" = []
diff --git a/services/mgmt/commerce/Cargo.toml b/services/mgmt/commerce/Cargo.toml
index 1f5588d921..6130b85994 100644
--- a/services/mgmt/commerce/Cargo.toml
+++ b/services/mgmt/commerce/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["profile-hybrid-2020-09-01"]
+default = ["profile-hybrid-2020-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2015-06-preview" = []
 "profile-hybrid-2020-09-01" = []
diff --git a/services/mgmt/communication/Cargo.toml b/services/mgmt/communication/Cargo.toml
index 2bef7cab5b..b0f294bcd3 100644
--- a/services/mgmt/communication/Cargo.toml
+++ b/services/mgmt/communication/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-08-20"]
+default = ["package-2020-08-20", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-08-20" = []
 "package-2020-08-20-preview" = []
diff --git a/services/mgmt/compute/Cargo.toml b/services/mgmt/compute/Cargo.toml
index 05c870e38c..84d8b292e6 100644
--- a/services/mgmt/compute/Cargo.toml
+++ b/services/mgmt/compute/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07-01"]
+default = ["package-2021-07-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-07-01" = []
 "package-2021-07-01-only" = []
diff --git a/services/mgmt/confidentialledger/Cargo.toml b/services/mgmt/confidentialledger/Cargo.toml
index cfc98da049..4c6f5d416d 100644
--- a/services/mgmt/confidentialledger/Cargo.toml
+++ b/services/mgmt/confidentialledger/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-12-01-preview"]
+default = ["package-2020-12-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12-01-preview" = []
 "package-2021-05-13-preview" = []
diff --git a/services/mgmt/confluent/Cargo.toml b/services/mgmt/confluent/Cargo.toml
index 4607795692..7c4cdd8f93 100644
--- a/services/mgmt/confluent/Cargo.toml
+++ b/services/mgmt/confluent/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-03-01"]
+default = ["package-2020-03-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-09" = []
 "package-2020-03-01" = []
diff --git a/services/mgmt/connectedvmware/Cargo.toml b/services/mgmt/connectedvmware/Cargo.toml
index e71fd33a05..56f4f81048 100644
--- a/services/mgmt/connectedvmware/Cargo.toml
+++ b/services/mgmt/connectedvmware/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10-01-preview"]
+default = ["package-2020-10-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10-01-preview" = []
diff --git a/services/mgmt/consumption/Cargo.toml b/services/mgmt/consumption/Cargo.toml
index 94441f19cc..543c26cd7b 100644
--- a/services/mgmt/consumption/Cargo.toml
+++ b/services/mgmt/consumption/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2019-10" = []
diff --git a/services/mgmt/containerinstance/Cargo.toml b/services/mgmt/containerinstance/Cargo.toml
index be4fdc32f9..6024bf921a 100644
--- a/services/mgmt/containerinstance/Cargo.toml
+++ b/services/mgmt/containerinstance/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09"]
+default = ["package-2021-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09" = []
 "package-2021-07" = []
diff --git a/services/mgmt/containerregistry/Cargo.toml b/services/mgmt/containerregistry/Cargo.toml
index 6ec45ddc19..7c199c26a8 100644
--- a/services/mgmt/containerregistry/Cargo.toml
+++ b/services/mgmt/containerregistry/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-05-only"]
+default = ["package-2019-05-only", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-preview-only" = []
 "package-2021-08-preview" = []
diff --git a/services/mgmt/containerservice/Cargo.toml b/services/mgmt/containerservice/Cargo.toml
index bfbaec29ce..f89f0b6fa7 100644
--- a/services/mgmt/containerservice/Cargo.toml
+++ b/services/mgmt/containerservice/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09"]
+default = ["package-2021-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09" = []
 "package-2021-08" = []
diff --git a/services/mgmt/cosmosdb/Cargo.toml b/services/mgmt/cosmosdb/Cargo.toml
index 99c66ba1d1..37d80c6e38 100644
--- a/services/mgmt/cosmosdb/Cargo.toml
+++ b/services/mgmt/cosmosdb/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-preview-2021-10" = []
diff --git a/services/mgmt/costmanagement/Cargo.toml b/services/mgmt/costmanagement/Cargo.toml
index 23c1f79de6..6182144cef 100644
--- a/services/mgmt/costmanagement/Cargo.toml
+++ b/services/mgmt/costmanagement/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2021-01" = []
diff --git a/services/mgmt/cpim/Cargo.toml b/services/mgmt/cpim/Cargo.toml
index a97fe79ec2..39b544844a 100644
--- a/services/mgmt/cpim/Cargo.toml
+++ b/services/mgmt/cpim/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-01-01-preview"]
+default = ["package-2019-01-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-01-01-preview" = []
 "package-2020-05-01-preview" = []
diff --git a/services/mgmt/customerinsights/Cargo.toml b/services/mgmt/customerinsights/Cargo.toml
index 7cfd2d4fd8..83d29a394b 100644
--- a/services/mgmt/customerinsights/Cargo.toml
+++ b/services/mgmt/customerinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-04"]
+default = ["package-2017-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-04" = []
 "package-2017-01" = []
diff --git a/services/mgmt/customerlockbox/Cargo.toml b/services/mgmt/customerlockbox/Cargo.toml
index a7082c463f..a03f515668 100644
--- a/services/mgmt/customerlockbox/Cargo.toml
+++ b/services/mgmt/customerlockbox/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-02-28-preview"]
+default = ["package-2018-02-28-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-02-28-preview" = []
diff --git a/services/mgmt/customproviders/Cargo.toml b/services/mgmt/customproviders/Cargo.toml
index 2ff1bd803b..1d5aee08c1 100644
--- a/services/mgmt/customproviders/Cargo.toml
+++ b/services/mgmt/customproviders/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-01-preview"]
+default = ["package-2018-09-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-01-preview" = []
diff --git a/services/mgmt/data/Cargo.toml b/services/mgmt/data/Cargo.toml
index 7099d9edf8..3b5e40b9c3 100644
--- a/services/mgmt/data/Cargo.toml
+++ b/services/mgmt/data/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-preview-2019-07"]
+default = ["package-preview-2019-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2019-07" = []
 "package-2017-03-01-preview" = []
diff --git a/services/mgmt/databox/Cargo.toml b/services/mgmt/databox/Cargo.toml
index f488f1247a..e00645731c 100644
--- a/services/mgmt/databox/Cargo.toml
+++ b/services/mgmt/databox/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05"]
+default = ["package-2021-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-preview" = []
 "package-2021-05" = []
diff --git a/services/mgmt/databoxedge/Cargo.toml b/services/mgmt/databoxedge/Cargo.toml
index 5da1794ad1..9bf415d045 100644
--- a/services/mgmt/databoxedge/Cargo.toml
+++ b/services/mgmt/databoxedge/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06-01"]
+default = ["package-2021-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06-01" = []
 "package-2021-06-01-preview" = []
diff --git a/services/mgmt/databricks/Cargo.toml b/services/mgmt/databricks/Cargo.toml
index 10c9f99886..692e862256 100644
--- a/services/mgmt/databricks/Cargo.toml
+++ b/services/mgmt/databricks/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-04-01"]
+default = ["package-2018-04-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-04-01" = []
diff --git a/services/mgmt/datacatalog/Cargo.toml b/services/mgmt/datacatalog/Cargo.toml
index 8efb31862b..0fd9eecc6b 100644
--- a/services/mgmt/datacatalog/Cargo.toml
+++ b/services/mgmt/datacatalog/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-03-30"]
+default = ["package-2016-03-30", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-03-30" = []
diff --git a/services/mgmt/datadog/Cargo.toml b/services/mgmt/datadog/Cargo.toml
index 6658c6fe45..c154f08bee 100644
--- a/services/mgmt/datadog/Cargo.toml
+++ b/services/mgmt/datadog/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03"]
+default = ["package-2021-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03" = []
 "package-2020-02-preview" = []
diff --git a/services/mgmt/datafactory/Cargo.toml b/services/mgmt/datafactory/Cargo.toml
index 3a64058dbc..6526046442 100644
--- a/services/mgmt/datafactory/Cargo.toml
+++ b/services/mgmt/datafactory/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-06"]
+default = ["package-2018-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-06" = []
 "package-2017-09-preview" = []
diff --git a/services/mgmt/datalakeanalytics/Cargo.toml b/services/mgmt/datalakeanalytics/Cargo.toml
index 31b2ce4e40..0c59eeeac5 100644
--- a/services/mgmt/datalakeanalytics/Cargo.toml
+++ b/services/mgmt/datalakeanalytics/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-11"]
+default = ["package-2016-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2019-11" = []
 "package-2016-11" = []
diff --git a/services/mgmt/datalakestore/Cargo.toml b/services/mgmt/datalakestore/Cargo.toml
index 6da9480f39..295111d99a 100644
--- a/services/mgmt/datalakestore/Cargo.toml
+++ b/services/mgmt/datalakestore/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-11"]
+default = ["package-2016-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-11" = []
 "package-2015-10-preview" = []
diff --git a/services/mgmt/dataprotection/Cargo.toml b/services/mgmt/dataprotection/Cargo.toml
index 20dd9d9d10..0604e13cb9 100644
--- a/services/mgmt/dataprotection/Cargo.toml
+++ b/services/mgmt/dataprotection/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07"]
+default = ["package-2021-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-preview" = []
 "package-2021-07" = []
diff --git a/services/mgmt/datashare/Cargo.toml b/services/mgmt/datashare/Cargo.toml
index 8398effa6b..5936e6160a 100644
--- a/services/mgmt/datashare/Cargo.toml
+++ b/services/mgmt/datashare/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-11-01"]
+default = ["package-2019-11-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-11-01-preview" = []
 "package-2019-11-01" = []
diff --git a/services/mgmt/deploymentmanager/Cargo.toml b/services/mgmt/deploymentmanager/Cargo.toml
index a7a34edae3..972fbd9983 100644
--- a/services/mgmt/deploymentmanager/Cargo.toml
+++ b/services/mgmt/deploymentmanager/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-11-01-preview"]
+default = ["package-2019-11-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-11-01-preview" = []
diff --git a/services/mgmt/desktopvirtualization/Cargo.toml b/services/mgmt/desktopvirtualization/Cargo.toml
index 30adb90254..ea17ca7e6c 100644
--- a/services/mgmt/desktopvirtualization/Cargo.toml
+++ b/services/mgmt/desktopvirtualization/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07"]
+default = ["package-2021-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-09" = []
 "package-2021-07" = []
diff --git a/services/mgmt/deviceupdate/Cargo.toml b/services/mgmt/deviceupdate/Cargo.toml
index ccd86ba635..9a68bf8e1a 100644
--- a/services/mgmt/deviceupdate/Cargo.toml
+++ b/services/mgmt/deviceupdate/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-03-01-preview"]
+default = ["package-2020-03-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-03-01-preview" = []
diff --git a/services/mgmt/devops/Cargo.toml b/services/mgmt/devops/Cargo.toml
index 7a4007e531..638a7483ec 100644
--- a/services/mgmt/devops/Cargo.toml
+++ b/services/mgmt/devops/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-07-13-preview"]
+default = ["package-2020-07-13-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-07-13-preview" = []
 "package-2019-07-01-preview" = []
diff --git a/services/mgmt/devspaces/Cargo.toml b/services/mgmt/devspaces/Cargo.toml
index f3f8ff65a8..9354aa555e 100644
--- a/services/mgmt/devspaces/Cargo.toml
+++ b/services/mgmt/devspaces/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-04-01"]
+default = ["package-2019-04-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-04-01" = []
diff --git a/services/mgmt/devtestlabs/Cargo.toml b/services/mgmt/devtestlabs/Cargo.toml
index 9359b944de..f2755f4aaa 100644
--- a/services/mgmt/devtestlabs/Cargo.toml
+++ b/services/mgmt/devtestlabs/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09"]
+default = ["package-2018-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09" = []
 "package-2016-05" = []
diff --git a/services/mgmt/dfp/Cargo.toml b/services/mgmt/dfp/Cargo.toml
index 23a9a4646b..ee66bdcb41 100644
--- a/services/mgmt/dfp/Cargo.toml
+++ b/services/mgmt/dfp/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-02-01-preview"]
+default = ["package-2021-02-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-02-01-preview" = []
diff --git a/services/mgmt/digitaltwins/Cargo.toml b/services/mgmt/digitaltwins/Cargo.toml
index c678dd046f..8a8ce56be5 100644
--- a/services/mgmt/digitaltwins/Cargo.toml
+++ b/services/mgmt/digitaltwins/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-12"]
+default = ["package-2020-12", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12" = []
 "package-2020-10" = []
diff --git a/services/mgmt/dns/Cargo.toml b/services/mgmt/dns/Cargo.toml
index 1f4d5955f9..522620b8f6 100644
--- a/services/mgmt/dns/Cargo.toml
+++ b/services/mgmt/dns/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-05"]
+default = ["package-2018-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-05" = []
 "package-2018-03-preview" = []
diff --git a/services/mgmt/domainservices/Cargo.toml b/services/mgmt/domainservices/Cargo.toml
index 665fde2af0..93f1ece83b 100644
--- a/services/mgmt/domainservices/Cargo.toml
+++ b/services/mgmt/domainservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05"]
+default = ["package-2021-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-05" = []
 "package-2021-03" = []
diff --git a/services/mgmt/edgeorder/Cargo.toml b/services/mgmt/edgeorder/Cargo.toml
index ec7b43eca9..840a6dfe02 100644
--- a/services/mgmt/edgeorder/Cargo.toml
+++ b/services/mgmt/edgeorder/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-12"]
+default = ["package-2021-12", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-12" = []
 "package-2020-12-preview" = []
diff --git a/services/mgmt/edgeorderpartner/Cargo.toml b/services/mgmt/edgeorderpartner/Cargo.toml
index c7a7a1d4e6..9690827636 100644
--- a/services/mgmt/edgeorderpartner/Cargo.toml
+++ b/services/mgmt/edgeorderpartner/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-12-preview"]
+default = ["package-2020-12-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12-preview" = []
diff --git a/services/mgmt/elastic/Cargo.toml b/services/mgmt/elastic/Cargo.toml
index 46e0e3e2d0..36eded3a03 100644
--- a/services/mgmt/elastic/Cargo.toml
+++ b/services/mgmt/elastic/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-07-01"]
+default = ["package-2020-07-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-07-01-preview" = []
 "package-2020-07-01" = []
diff --git a/services/mgmt/engagementfabric/Cargo.toml b/services/mgmt/engagementfabric/Cargo.toml
index 9263c9ef82..2ea304a286 100644
--- a/services/mgmt/engagementfabric/Cargo.toml
+++ b/services/mgmt/engagementfabric/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-preview"]
+default = ["package-2018-09-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-preview" = []
diff --git a/services/mgmt/enterpriseknowledgegraph/Cargo.toml b/services/mgmt/enterpriseknowledgegraph/Cargo.toml
index f6ab270ca7..bebfd85864 100644
--- a/services/mgmt/enterpriseknowledgegraph/Cargo.toml
+++ b/services/mgmt/enterpriseknowledgegraph/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-12-03"]
+default = ["package-2018-12-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-12-03" = []
diff --git a/services/mgmt/eventgrid/Cargo.toml b/services/mgmt/eventgrid/Cargo.toml
index 1a354e0fb1..23b01a56aa 100644
--- a/services/mgmt/eventgrid/Cargo.toml
+++ b/services/mgmt/eventgrid/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-12"]
+default = ["package-2021-12", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-12" = []
diff --git a/services/mgmt/eventhub/Cargo.toml b/services/mgmt/eventhub/Cargo.toml
index 3a42ec76c5..c02a435175 100644
--- a/services/mgmt/eventhub/Cargo.toml
+++ b/services/mgmt/eventhub/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-04"]
+default = ["package-2017-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-04" = []
 "package-2015-08" = []
diff --git a/services/mgmt/extendedlocation/Cargo.toml b/services/mgmt/extendedlocation/Cargo.toml
index 7b0be42dca..6d144605c2 100644
--- a/services/mgmt/extendedlocation/Cargo.toml
+++ b/services/mgmt/extendedlocation/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08-15"]
+default = ["package-2021-08-15", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03-15-preview" = []
 "package-2021-08-15" = []
diff --git a/services/mgmt/fluidrelay/Cargo.toml b/services/mgmt/fluidrelay/Cargo.toml
index ab0b5cb2cf..caf5dfc320 100644
--- a/services/mgmt/fluidrelay/Cargo.toml
+++ b/services/mgmt/fluidrelay/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03-12-preview"]
+default = ["package-2021-03-12-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03-12-preview" = []
 "package-2021-06-15-preview" = []
diff --git a/services/mgmt/frontdoor/Cargo.toml b/services/mgmt/frontdoor/Cargo.toml
index aa530c76e4..f62bcec38f 100644
--- a/services/mgmt/frontdoor/Cargo.toml
+++ b/services/mgmt/frontdoor/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-11"]
+default = ["package-2020-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-11" = []
 "package-2020-05" = []
diff --git a/services/mgmt/guestconfiguration/Cargo.toml b/services/mgmt/guestconfiguration/Cargo.toml
index ad7c82bcde..ca720995e7 100644
--- a/services/mgmt/guestconfiguration/Cargo.toml
+++ b/services/mgmt/guestconfiguration/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-25"]
+default = ["package-2021-01-25", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-25" = []
 "package-2020-06-25" = []
diff --git a/services/mgmt/hanaon/Cargo.toml b/services/mgmt/hanaon/Cargo.toml
index 744b752e75..60ff5461a9 100644
--- a/services/mgmt/hanaon/Cargo.toml
+++ b/services/mgmt/hanaon/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-11"]
+default = ["package-2017-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-11" = []
 "package-2020-02-07-preview" = []
diff --git a/services/mgmt/hardwaresecuritymodules/Cargo.toml b/services/mgmt/hardwaresecuritymodules/Cargo.toml
index a3ccc5c788..891c5ee8f7 100644
--- a/services/mgmt/hardwaresecuritymodules/Cargo.toml
+++ b/services/mgmt/hardwaresecuritymodules/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-10"]
+default = ["package-2018-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-10" = []
diff --git a/services/mgmt/hdinsight/Cargo.toml b/services/mgmt/hdinsight/Cargo.toml
index 947234890d..0e8f539f6f 100644
--- a/services/mgmt/hdinsight/Cargo.toml
+++ b/services/mgmt/hdinsight/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06"]
+default = ["package-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06" = []
 "package-2018-06-preview" = []
diff --git a/services/mgmt/healthbot/Cargo.toml b/services/mgmt/healthbot/Cargo.toml
index 31e142bda9..3e2dea291a 100644
--- a/services/mgmt/healthbot/Cargo.toml
+++ b/services/mgmt/healthbot/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08-24"]
+default = ["package-2021-08-24", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-24" = []
 "package-2021-06-10" = []
diff --git a/services/mgmt/healthcareapis/Cargo.toml b/services/mgmt/healthcareapis/Cargo.toml
index d0ccba498c..fa30f591ea 100644
--- a/services/mgmt/healthcareapis/Cargo.toml
+++ b/services/mgmt/healthcareapis/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01"]
+default = ["package-2021-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-06" = []
 "package-2021-01" = []
diff --git a/services/mgmt/hybridcompute/Cargo.toml b/services/mgmt/hybridcompute/Cargo.toml
index 6ba5a6c538..6fffa9fb5e 100644
--- a/services/mgmt/hybridcompute/Cargo.toml
+++ b/services/mgmt/hybridcompute/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05"]
+default = ["package-2021-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-06" = []
 "package-preview-2021-05" = []
diff --git a/services/mgmt/hybridconnectivity/Cargo.toml b/services/mgmt/hybridconnectivity/Cargo.toml
index 92e5a11202..3590e89463 100644
--- a/services/mgmt/hybridconnectivity/Cargo.toml
+++ b/services/mgmt/hybridconnectivity/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-06-preview"]
+default = ["package-2021-10-06-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-06-preview" = []
diff --git a/services/mgmt/hybriddatamanager/Cargo.toml b/services/mgmt/hybriddatamanager/Cargo.toml
index b911cbf372..4b024f8b25 100644
--- a/services/mgmt/hybriddatamanager/Cargo.toml
+++ b/services/mgmt/hybriddatamanager/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-06"]
+default = ["package-2019-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-06" = []
 "package-2016-06" = []
diff --git a/services/mgmt/hybridkubernetes/Cargo.toml b/services/mgmt/hybridkubernetes/Cargo.toml
index 7ba4366ddd..1a535a700c 100644
--- a/services/mgmt/hybridkubernetes/Cargo.toml
+++ b/services/mgmt/hybridkubernetes/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03-01"]
+default = ["package-2021-03-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-01-01-preview" = []
 "package-2021-04-01-preview" = []
diff --git a/services/mgmt/hybridnetwork/Cargo.toml b/services/mgmt/hybridnetwork/Cargo.toml
index eb696535cf..2c2f6afd37 100644
--- a/services/mgmt/hybridnetwork/Cargo.toml
+++ b/services/mgmt/hybridnetwork/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05-01"]
+default = ["package-2021-05-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-05-01" = []
 "package-2020-01-01-preview" = []
diff --git a/services/mgmt/imagebuilder/Cargo.toml b/services/mgmt/imagebuilder/Cargo.toml
index 5b3e57e652..07b1b32fe5 100644
--- a/services/mgmt/imagebuilder/Cargo.toml
+++ b/services/mgmt/imagebuilder/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-02"]
+default = ["package-2020-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-02" = []
 "package-preview-2019-05" = []
diff --git a/services/mgmt/intune/Cargo.toml b/services/mgmt/intune/Cargo.toml
index 6fe48524fd..376030c192 100644
--- a/services/mgmt/intune/Cargo.toml
+++ b/services/mgmt/intune/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2015-01-preview"]
+default = ["package-2015-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2015-01-preview" = []
 "package-2015-01-privatepreview" = []
diff --git a/services/mgmt/iotcentral/Cargo.toml b/services/mgmt/iotcentral/Cargo.toml
index eacea5d969..d16f83d4c4 100644
--- a/services/mgmt/iotcentral/Cargo.toml
+++ b/services/mgmt/iotcentral/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06"]
+default = ["package-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06" = []
 "package-2018-09-01" = []
diff --git a/services/mgmt/iothub/Cargo.toml b/services/mgmt/iothub/Cargo.toml
index aefb3c9c5f..aab5903580 100644
--- a/services/mgmt/iothub/Cargo.toml
+++ b/services/mgmt/iothub/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03"]
+default = ["package-2021-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03" = []
 "package-preview-2021-03" = []
diff --git a/services/mgmt/keyvault/Cargo.toml b/services/mgmt/keyvault/Cargo.toml
index d883a3ba56..cc8e382dbf 100644
--- a/services/mgmt/keyvault/Cargo.toml
+++ b/services/mgmt/keyvault/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-09"]
+default = ["package-2019-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-06" = []
 "package-preview-2021-04" = []
diff --git a/services/mgmt/kubernetesconfiguration/Cargo.toml b/services/mgmt/kubernetesconfiguration/Cargo.toml
index ca8f246f87..21459402a6 100644
--- a/services/mgmt/kubernetesconfiguration/Cargo.toml
+++ b/services/mgmt/kubernetesconfiguration/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09"]
+default = ["package-2021-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09" = []
diff --git a/services/mgmt/kusto/Cargo.toml b/services/mgmt/kusto/Cargo.toml
index 8c5d347540..7f5f581a28 100644
--- a/services/mgmt/kusto/Cargo.toml
+++ b/services/mgmt/kusto/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08-27"]
+default = ["package-2021-08-27", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-27" = []
 "package-2021-01" = []
diff --git a/services/mgmt/labservices/Cargo.toml b/services/mgmt/labservices/Cargo.toml
index a5c78186d6..0aebf07cfd 100644
--- a/services/mgmt/labservices/Cargo.toml
+++ b/services/mgmt/labservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-10"]
+default = ["package-2018-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-11" = []
 "package-preview-2021-10" = []
diff --git a/services/mgmt/logic/Cargo.toml b/services/mgmt/logic/Cargo.toml
index f0eae3140f..42282a2a14 100644
--- a/services/mgmt/logic/Cargo.toml
+++ b/services/mgmt/logic/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-05"]
+default = ["package-2019-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-05" = []
 "package-2018-07-preview" = []
diff --git a/services/mgmt/logz/Cargo.toml b/services/mgmt/logz/Cargo.toml
index 6a040b00b2..c175f67d77 100644
--- a/services/mgmt/logz/Cargo.toml
+++ b/services/mgmt/logz/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10-01"]
+default = ["package-2020-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10-01-preview" = []
 "package-2020-10-01" = []
diff --git a/services/mgmt/machinelearning/Cargo.toml b/services/mgmt/machinelearning/Cargo.toml
index 1670f61175..4c3ec3d789 100644
--- a/services/mgmt/machinelearning/Cargo.toml
+++ b/services/mgmt/machinelearning/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-webservices-2017-01"]
+default = ["package-webservices-2017-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-webservices-2017-01" = []
 "package-commitmentPlans-2016-05-preview" = []
diff --git a/services/mgmt/machinelearningcompute/Cargo.toml b/services/mgmt/machinelearningcompute/Cargo.toml
index ea34d792f3..8eb677aa1b 100644
--- a/services/mgmt/machinelearningcompute/Cargo.toml
+++ b/services/mgmt/machinelearningcompute/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-08-preview"]
+default = ["package-2017-08-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-08-preview" = []
 "package-2017-06-preview" = []
diff --git a/services/mgmt/machinelearningexperimentation/Cargo.toml b/services/mgmt/machinelearningexperimentation/Cargo.toml
index 783c388fc3..cb95ce4641 100644
--- a/services/mgmt/machinelearningexperimentation/Cargo.toml
+++ b/services/mgmt/machinelearningexperimentation/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-05-preview"]
+default = ["package-2017-05-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-05-preview" = []
diff --git a/services/mgmt/machinelearningservices/Cargo.toml b/services/mgmt/machinelearningservices/Cargo.toml
index 5a9ef52657..dee5f71051 100644
--- a/services/mgmt/machinelearningservices/Cargo.toml
+++ b/services/mgmt/machinelearningservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07-01"]
+default = ["package-2021-07-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-07-01" = []
 "package-2021-04-01" = []
diff --git a/services/mgmt/maintenance/Cargo.toml b/services/mgmt/maintenance/Cargo.toml
index ca35ccaf37..6090468474 100644
--- a/services/mgmt/maintenance/Cargo.toml
+++ b/services/mgmt/maintenance/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05"]
+default = ["package-2021-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-09" = []
 "package-2021-05" = []
diff --git a/services/mgmt/managednetwork/Cargo.toml b/services/mgmt/managednetwork/Cargo.toml
index 7c646cc8ea..9902462111 100644
--- a/services/mgmt/managednetwork/Cargo.toml
+++ b/services/mgmt/managednetwork/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-06-01-preview"]
+default = ["package-2019-06-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-06-01-preview" = []
diff --git a/services/mgmt/managedservices/Cargo.toml b/services/mgmt/managedservices/Cargo.toml
index 1b09c61e08..3e146b1529 100644
--- a/services/mgmt/managedservices/Cargo.toml
+++ b/services/mgmt/managedservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-09"]
+default = ["package-2019-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-02-preview" = []
 "package-2019-09" = []
diff --git a/services/mgmt/managementgroups/Cargo.toml b/services/mgmt/managementgroups/Cargo.toml
index 79562da50c..4e4e486390 100644
--- a/services/mgmt/managementgroups/Cargo.toml
+++ b/services/mgmt/managementgroups/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-04"]
+default = ["package-2021-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-04" = []
 "package-2020-10" = []
diff --git a/services/mgmt/managementpartner/Cargo.toml b/services/mgmt/managementpartner/Cargo.toml
index d6b844f2b0..274d6fb7b0 100644
--- a/services/mgmt/managementpartner/Cargo.toml
+++ b/services/mgmt/managementpartner/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-02"]
+default = ["package-2018-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-02" = []
diff --git a/services/mgmt/maps/Cargo.toml b/services/mgmt/maps/Cargo.toml
index 86e7637dc7..584667ec9e 100644
--- a/services/mgmt/maps/Cargo.toml
+++ b/services/mgmt/maps/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-02"]
+default = ["package-2021-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-12" = []
 "package-preview-2021-07" = []
diff --git a/services/mgmt/mariadb/Cargo.toml b/services/mgmt/mariadb/Cargo.toml
index b695cf969c..69893b564f 100644
--- a/services/mgmt/mariadb/Cargo.toml
+++ b/services/mgmt/mariadb/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-06-01"]
+default = ["package-2018-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-06-01-preview" = []
 "package-2018-06-01" = []
diff --git a/services/mgmt/marketplacenotifications/Cargo.toml b/services/mgmt/marketplacenotifications/Cargo.toml
index 3e7d9166fa..3456fb0148 100644
--- a/services/mgmt/marketplacenotifications/Cargo.toml
+++ b/services/mgmt/marketplacenotifications/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-composite-v1"]
+default = ["package-composite-v1", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-composite-v1" = []
 "package-2021-03-03" = []
diff --git a/services/mgmt/marketplaceordering/Cargo.toml b/services/mgmt/marketplaceordering/Cargo.toml
index 3cfb3541fe..03ec692d8b 100644
--- a/services/mgmt/marketplaceordering/Cargo.toml
+++ b/services/mgmt/marketplaceordering/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-01"]
+default = ["package-2021-01-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-01" = []
 "package-2015-06-01" = []
diff --git a/services/mgmt/mediaservices/Cargo.toml b/services/mgmt/mediaservices/Cargo.toml
index b0842f6568..63b21e6fa4 100644
--- a/services/mgmt/mediaservices/Cargo.toml
+++ b/services/mgmt/mediaservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06"]
+default = ["package-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06" = []
 "package-2021-05" = []
diff --git a/services/mgmt/migrate/Cargo.toml b/services/mgmt/migrate/Cargo.toml
index 4c07e783c4..a5f412acc7 100644
--- a/services/mgmt/migrate/Cargo.toml
+++ b/services/mgmt/migrate/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-02"]
+default = ["package-2018-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-02" = []
 "package-2019-10" = []
diff --git a/services/mgmt/migrateprojects/Cargo.toml b/services/mgmt/migrateprojects/Cargo.toml
index d60fb36131..be00370c8d 100644
--- a/services/mgmt/migrateprojects/Cargo.toml
+++ b/services/mgmt/migrateprojects/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09"]
+default = ["package-2018-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09" = []
diff --git a/services/mgmt/monitor/Cargo.toml b/services/mgmt/monitor/Cargo.toml
index 89bee118be..4a4f483798 100644
--- a/services/mgmt/monitor/Cargo.toml
+++ b/services/mgmt/monitor/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09"]
+default = ["package-2021-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09" = []
 "package-2021-09-01-only" = []
diff --git a/services/mgmt/msi/Cargo.toml b/services/mgmt/msi/Cargo.toml
index b48b7b226a..8c8beaff24 100644
--- a/services/mgmt/msi/Cargo.toml
+++ b/services/mgmt/msi/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-11-30"]
+default = ["package-2018-11-30", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-11-30" = []
 "package-2015-08-31-preview" = []
diff --git a/services/mgmt/mysql/Cargo.toml b/services/mgmt/mysql/Cargo.toml
index 944825be14..dabae95cda 100644
--- a/services/mgmt/mysql/Cargo.toml
+++ b/services/mgmt/mysql/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-12-01"]
+default = ["package-2017-12-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-12-01-preview" = []
 "package-2017-12-01" = []
diff --git a/services/mgmt/netapp/Cargo.toml b/services/mgmt/netapp/Cargo.toml
index 2d0cfc4c0f..e974419f97 100644
--- a/services/mgmt/netapp/Cargo.toml
+++ b/services/mgmt/netapp/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-netapp-2021-06-01"]
+default = ["package-netapp-2021-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-netapp-2021-06-01" = []
 "package-netapp-2021-04-01" = []
diff --git a/services/mgmt/network/Cargo.toml b/services/mgmt/network/Cargo.toml
index dac5570d01..93d123bcf6 100644
--- a/services/mgmt/network/Cargo.toml
+++ b/services/mgmt/network/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-05"]
+default = ["package-2021-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-05" = []
 "package-2021-03" = []
diff --git a/services/mgmt/notificationhubs/Cargo.toml b/services/mgmt/notificationhubs/Cargo.toml
index f5e964625f..56e87532a8 100644
--- a/services/mgmt/notificationhubs/Cargo.toml
+++ b/services/mgmt/notificationhubs/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-04"]
+default = ["package-2017-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-04" = []
 "package-2016-03" = []
diff --git a/services/mgmt/operationalinsights/Cargo.toml b/services/mgmt/operationalinsights/Cargo.toml
index 286b7e17ac..3c44baa4e1 100644
--- a/services/mgmt/operationalinsights/Cargo.toml
+++ b/services/mgmt/operationalinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2015-03"]
+default = ["package-2015-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2015-11-preview" = []
 "package-2015-03" = []
diff --git a/services/mgmt/operationsmanagement/Cargo.toml b/services/mgmt/operationsmanagement/Cargo.toml
index 2afe6ea18b..b7c39723e3 100644
--- a/services/mgmt/operationsmanagement/Cargo.toml
+++ b/services/mgmt/operationsmanagement/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2015-11-preview"]
+default = ["package-2015-11-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2015-11-preview" = []
diff --git a/services/mgmt/peering/Cargo.toml b/services/mgmt/peering/Cargo.toml
index 8fffee885d..e9921fbeb9 100644
--- a/services/mgmt/peering/Cargo.toml
+++ b/services/mgmt/peering/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06-01"]
+default = ["package-2021-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06-01" = []
 "package-2021-01-01" = []
diff --git a/services/mgmt/policyinsights/Cargo.toml b/services/mgmt/policyinsights/Cargo.toml
index fd759d1ac9..82d703d373 100644
--- a/services/mgmt/policyinsights/Cargo.toml
+++ b/services/mgmt/policyinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2021-01" = []
diff --git a/services/mgmt/portal/Cargo.toml b/services/mgmt/portal/Cargo.toml
index 24ba19bc52..2be8eb14b2 100644
--- a/services/mgmt/portal/Cargo.toml
+++ b/services/mgmt/portal/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-09-01-preview"]
+default = ["package-2020-09-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-09-01-preview" = []
 "package-2019-01-01-preview" = []
diff --git a/services/mgmt/postgresql/Cargo.toml b/services/mgmt/postgresql/Cargo.toml
index aa7a8d32b2..eb86c76f2d 100644
--- a/services/mgmt/postgresql/Cargo.toml
+++ b/services/mgmt/postgresql/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-flexibleserver-2021-06"]
+default = ["package-flexibleserver-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06-15-privatepreview" = []
 "package-flexibleserver-2021-06" = []
diff --git a/services/mgmt/postgresqlhsc/Cargo.toml b/services/mgmt/postgresqlhsc/Cargo.toml
index 066bece577..2dc6653a43 100644
--- a/services/mgmt/postgresqlhsc/Cargo.toml
+++ b/services/mgmt/postgresqlhsc/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10-05-privatepreview"]
+default = ["package-2020-10-05-privatepreview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10-05-privatepreview" = []
diff --git a/services/mgmt/powerbidedicated/Cargo.toml b/services/mgmt/powerbidedicated/Cargo.toml
index 081a63ebb7..7790211a36 100644
--- a/services/mgmt/powerbidedicated/Cargo.toml
+++ b/services/mgmt/powerbidedicated/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-01"]
+default = ["package-2021-01-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-01" = []
 "package-2017-10-01" = []
diff --git a/services/mgmt/powerbiembedded/Cargo.toml b/services/mgmt/powerbiembedded/Cargo.toml
index 0c73af5ec0..c013edea60 100644
--- a/services/mgmt/powerbiembedded/Cargo.toml
+++ b/services/mgmt/powerbiembedded/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-01"]
+default = ["package-2016-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-01" = []
diff --git a/services/mgmt/powerbiprivatelinks/Cargo.toml b/services/mgmt/powerbiprivatelinks/Cargo.toml
index 5739bd6afa..9946c313ec 100644
--- a/services/mgmt/powerbiprivatelinks/Cargo.toml
+++ b/services/mgmt/powerbiprivatelinks/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-06-01"]
+default = ["package-2020-06-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-06-01" = []
diff --git a/services/mgmt/powerplatform/Cargo.toml b/services/mgmt/powerplatform/Cargo.toml
index 5dc28164d4..ba80444ba4 100644
--- a/services/mgmt/powerplatform/Cargo.toml
+++ b/services/mgmt/powerplatform/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10-30-preview"]
+default = ["package-2020-10-30-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10-30-preview" = []
diff --git a/services/mgmt/privatedns/Cargo.toml b/services/mgmt/privatedns/Cargo.toml
index 0cf0d6ffe2..beaafb7cec 100644
--- a/services/mgmt/privatedns/Cargo.toml
+++ b/services/mgmt/privatedns/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09"]
+default = ["package-2018-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09" = []
 "package-2020-01" = []
diff --git a/services/mgmt/providerhub/Cargo.toml b/services/mgmt/providerhub/Cargo.toml
index e3833b7466..f5c1a65892 100644
--- a/services/mgmt/providerhub/Cargo.toml
+++ b/services/mgmt/providerhub/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-11-20"]
+default = ["package-2020-11-20", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09-01-preview" = []
 "package-2021-06-01-preview" = []
diff --git a/services/mgmt/purview/Cargo.toml b/services/mgmt/purview/Cargo.toml
index ea8ce270bf..c2b7a37a74 100644
--- a/services/mgmt/purview/Cargo.toml
+++ b/services/mgmt/purview/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07-01"]
+default = ["package-2021-07-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12-01-preview" = []
 "package-2021-07-01" = []
diff --git a/services/mgmt/quantum/Cargo.toml b/services/mgmt/quantum/Cargo.toml
index abf577cb7f..35f36c03a4 100644
--- a/services/mgmt/quantum/Cargo.toml
+++ b/services/mgmt/quantum/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-11-04-preview"]
+default = ["package-2019-11-04-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-11-04-preview" = []
diff --git a/services/mgmt/quota/Cargo.toml b/services/mgmt/quota/Cargo.toml
index 23d85b669b..6264f93339 100644
--- a/services/mgmt/quota/Cargo.toml
+++ b/services/mgmt/quota/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03-15"]
+default = ["package-2021-03-15", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-03-15" = []
 "package-2021-03-15-preview" = []
diff --git a/services/mgmt/recoveryservices/Cargo.toml b/services/mgmt/recoveryservices/Cargo.toml
index 0373811da9..b0ec067a56 100644
--- a/services/mgmt/recoveryservices/Cargo.toml
+++ b/services/mgmt/recoveryservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08"]
+default = ["package-2021-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08" = []
 "package-2021-07" = []
diff --git a/services/mgmt/recoveryservicesbackup/Cargo.toml b/services/mgmt/recoveryservicesbackup/Cargo.toml
index a19d0cebe1..aa7a775ff8 100644
--- a/services/mgmt/recoveryservicesbackup/Cargo.toml
+++ b/services/mgmt/recoveryservicesbackup/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08"]
+default = ["package-2021-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08" = []
 "package-2021-07" = []
diff --git a/services/mgmt/recoveryservicessiterecovery/Cargo.toml b/services/mgmt/recoveryservicessiterecovery/Cargo.toml
index 3d18fa95f5..dc66519c3a 100644
--- a/services/mgmt/recoveryservicessiterecovery/Cargo.toml
+++ b/services/mgmt/recoveryservicessiterecovery/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08"]
+default = ["package-2021-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08" = []
 "package-2021-07" = []
diff --git a/services/mgmt/redhatopenshift/Cargo.toml b/services/mgmt/redhatopenshift/Cargo.toml
index 3c0931e954..35ee62c091 100644
--- a/services/mgmt/redhatopenshift/Cargo.toml
+++ b/services/mgmt/redhatopenshift/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-04-30"]
+default = ["package-2020-04-30", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-04-30" = []
 "package-2021-09-01-preview" = []
diff --git a/services/mgmt/redis/Cargo.toml b/services/mgmt/redis/Cargo.toml
index e14e7b20af..4b0c7f3087 100644
--- a/services/mgmt/redis/Cargo.toml
+++ b/services/mgmt/redis/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-12"]
+default = ["package-2020-12", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12" = []
 "package-2020-06" = []
diff --git a/services/mgmt/redisenterprise/Cargo.toml b/services/mgmt/redisenterprise/Cargo.toml
index 06780db034..c6fae4391a 100644
--- a/services/mgmt/redisenterprise/Cargo.toml
+++ b/services/mgmt/redisenterprise/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08"]
+default = ["package-2021-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08" = []
 "package-preview-2021-02" = []
diff --git a/services/mgmt/relay/Cargo.toml b/services/mgmt/relay/Cargo.toml
index fd264fe1db..fbfcf195a6 100644
--- a/services/mgmt/relay/Cargo.toml
+++ b/services/mgmt/relay/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-04"]
+default = ["package-2017-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-04" = []
 "package-2016-07" = []
diff --git a/services/mgmt/reservations/Cargo.toml b/services/mgmt/reservations/Cargo.toml
index cc4cdbd3ae..caaa418600 100644
--- a/services/mgmt/reservations/Cargo.toml
+++ b/services/mgmt/reservations/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-07-01"]
+default = ["package-2021-07-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-07-01" = []
 "package-2020-10-25" = []
diff --git a/services/mgmt/resourceconnector/Cargo.toml b/services/mgmt/resourceconnector/Cargo.toml
index b0feb6e4ab..896d97dd33 100644
--- a/services/mgmt/resourceconnector/Cargo.toml
+++ b/services/mgmt/resourceconnector/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-31-preview"]
+default = ["package-2021-10-31-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-31-preview" = []
diff --git a/services/mgmt/resourcegraph/Cargo.toml b/services/mgmt/resourcegraph/Cargo.toml
index bda7a8dc63..56780edd75 100644
--- a/services/mgmt/resourcegraph/Cargo.toml
+++ b/services/mgmt/resourcegraph/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-03"]
+default = ["package-2021-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-06" = []
 "package-preview-2021-03" = []
diff --git a/services/mgmt/resourcehealth/Cargo.toml b/services/mgmt/resourcehealth/Cargo.toml
index aa05285fcf..dad45cac1c 100644
--- a/services/mgmt/resourcehealth/Cargo.toml
+++ b/services/mgmt/resourcehealth/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-07"]
+default = ["package-2017-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-07" = []
 "package-2015-01" = []
diff --git a/services/mgmt/resourcemover/Cargo.toml b/services/mgmt/resourcemover/Cargo.toml
index 6a7e8701ed..c4ac0fc9c9 100644
--- a/services/mgmt/resourcemover/Cargo.toml
+++ b/services/mgmt/resourcemover/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-01"]
+default = ["package-2021-01-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-10-01-preview" = []
 "package-2021-01-01" = []
diff --git a/services/mgmt/resources/Cargo.toml b/services/mgmt/resources/Cargo.toml
index 5d5750e98f..940d43b8b3 100644
--- a/services/mgmt/resources/Cargo.toml
+++ b/services/mgmt/resources/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-policy-2021-06"]
+default = ["package-policy-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-policy-2021-06" = []
 "package-privatelinks-2020-05" = []
diff --git a/services/mgmt/saas/Cargo.toml b/services/mgmt/saas/Cargo.toml
index fe9cfa7e39..6ca0ef249e 100644
--- a/services/mgmt/saas/Cargo.toml
+++ b/services/mgmt/saas/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-03-01-beta"]
+default = ["package-2018-03-01-beta", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-03-01-beta" = []
diff --git a/services/mgmt/scheduler/Cargo.toml b/services/mgmt/scheduler/Cargo.toml
index 1890122ed4..9afbef36e9 100644
--- a/services/mgmt/scheduler/Cargo.toml
+++ b/services/mgmt/scheduler/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-03"]
+default = ["package-2016-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-03" = []
 "package-2016-01" = []
diff --git a/services/mgmt/search/Cargo.toml b/services/mgmt/search/Cargo.toml
index cc82c42da0..3372d1b671 100644
--- a/services/mgmt/search/Cargo.toml
+++ b/services/mgmt/search/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-08"]
+default = ["package-2020-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-08" = []
 "package-2020-03" = []
diff --git a/services/mgmt/security/Cargo.toml b/services/mgmt/security/Cargo.toml
index 24c33852b9..db36c4373d 100644
--- a/services/mgmt/security/Cargo.toml
+++ b/services/mgmt/security/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-composite-v1"]
+default = ["package-composite-v1", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-08" = []
 "package-composite-v1" = []
diff --git a/services/mgmt/securityandcompliance/Cargo.toml b/services/mgmt/securityandcompliance/Cargo.toml
index 5e902b0674..49c23afd93 100644
--- a/services/mgmt/securityandcompliance/Cargo.toml
+++ b/services/mgmt/securityandcompliance/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-11"]
+default = ["package-2021-01-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-11" = []
 "package-2021-03-08" = []
diff --git a/services/mgmt/securityinsights/Cargo.toml b/services/mgmt/securityinsights/Cargo.toml
index e8c02ed7b4..8b3438af97 100644
--- a/services/mgmt/securityinsights/Cargo.toml
+++ b/services/mgmt/securityinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-04-01-only"]
+default = ["package-2021-04-01-only", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-04-01-only" = []
 "package-2020-01" = []
diff --git a/services/mgmt/serialconsole/Cargo.toml b/services/mgmt/serialconsole/Cargo.toml
index 402b2ccb71..164fa8ff59 100644
--- a/services/mgmt/serialconsole/Cargo.toml
+++ b/services/mgmt/serialconsole/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-05"]
+default = ["package-2018-05", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-05" = []
diff --git a/services/mgmt/servicebus/Cargo.toml b/services/mgmt/servicebus/Cargo.toml
index d46dfa5f1f..69d6335a8e 100644
--- a/services/mgmt/servicebus/Cargo.toml
+++ b/services/mgmt/servicebus/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-04"]
+default = ["package-2017-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-01-preview" = []
 "package-2021-06-preview" = []
diff --git a/services/mgmt/servicefabricmesh/Cargo.toml b/services/mgmt/servicefabricmesh/Cargo.toml
index 64b3f63cde..689cc790bb 100644
--- a/services/mgmt/servicefabricmesh/Cargo.toml
+++ b/services/mgmt/servicefabricmesh/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-01-preview"]
+default = ["package-2018-09-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-01-preview" = []
 "package-2018-07-01-preview" = []
diff --git a/services/mgmt/servicelinker/Cargo.toml b/services/mgmt/servicelinker/Cargo.toml
index 61eed34496..3773627feb 100644
--- a/services/mgmt/servicelinker/Cargo.toml
+++ b/services/mgmt/servicelinker/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-11-01-preview"]
+default = ["package-2021-11-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-11-01-preview" = []
diff --git a/services/mgmt/signalr/Cargo.toml b/services/mgmt/signalr/Cargo.toml
index 1f04525bca..924b980022 100644
--- a/services/mgmt/signalr/Cargo.toml
+++ b/services/mgmt/signalr/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-01"]
+default = ["package-2021-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09-01-preview" = []
 "package-2021-10-01" = []
diff --git a/services/mgmt/softwareplan/Cargo.toml b/services/mgmt/softwareplan/Cargo.toml
index dfe34bcfab..bbd18ee503 100644
--- a/services/mgmt/softwareplan/Cargo.toml
+++ b/services/mgmt/softwareplan/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-12-01"]
+default = ["package-2019-12-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-06-01-preview" = []
 "package-2019-12-01" = []
diff --git a/services/mgmt/solutions/Cargo.toml b/services/mgmt/solutions/Cargo.toml
index 7040ec0bc0..d44d7ecb5b 100644
--- a/services/mgmt/solutions/Cargo.toml
+++ b/services/mgmt/solutions/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-managedapplications-2021-07"]
+default = ["package-managedapplications-2021-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-managedapplications-2021-07" = []
diff --git a/services/mgmt/sql/Cargo.toml b/services/mgmt/sql/Cargo.toml
index b264ad9a4b..b9142d8ccf 100644
--- a/services/mgmt/sql/Cargo.toml
+++ b/services/mgmt/sql/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-composite-v5"]
+default = ["package-composite-v5", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-composite-v5" = []
 "package-composite-v4" = []
diff --git a/services/mgmt/sqlvirtualmachine/Cargo.toml b/services/mgmt/sqlvirtualmachine/Cargo.toml
index 5293f95d86..dc57096854 100644
--- a/services/mgmt/sqlvirtualmachine/Cargo.toml
+++ b/services/mgmt/sqlvirtualmachine/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-03-01-preview"]
+default = ["package-2017-03-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-03-01-preview" = []
diff --git a/services/mgmt/stack/Cargo.toml b/services/mgmt/stack/Cargo.toml
index 7b03907ab9..6c096ff810 100644
--- a/services/mgmt/stack/Cargo.toml
+++ b/services/mgmt/stack/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-01"]
+default = ["package-2016-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-01" = []
 "package-2017-06-01" = []
diff --git a/services/mgmt/storage/Cargo.toml b/services/mgmt/storage/Cargo.toml
index 45d3fb15a1..2f0b4431d9 100644
--- a/services/mgmt/storage/Cargo.toml
+++ b/services/mgmt/storage/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06"]
+default = ["package-2021-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06" = []
 "package-2021-04" = []
diff --git a/services/mgmt/storagecache/Cargo.toml b/services/mgmt/storagecache/Cargo.toml
index 6d29a5f8d8..c853d44226 100644
--- a/services/mgmt/storagecache/Cargo.toml
+++ b/services/mgmt/storagecache/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-09"]
+default = ["package-2021-09", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-09" = []
 "package-2021-05" = []
diff --git a/services/mgmt/storageimportexport/Cargo.toml b/services/mgmt/storageimportexport/Cargo.toml
index 12fc1e2499..4adbe1b1c6 100644
--- a/services/mgmt/storageimportexport/Cargo.toml
+++ b/services/mgmt/storageimportexport/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-11"]
+default = ["package-2016-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-01" = []
 "package-2016-11" = []
diff --git a/services/mgmt/storagepool/Cargo.toml b/services/mgmt/storagepool/Cargo.toml
index 06882fb62a..2d96539700 100644
--- a/services/mgmt/storagepool/Cargo.toml
+++ b/services/mgmt/storagepool/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-08-01"]
+default = ["package-2021-08-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-08-01" = []
 "package-2021-04-01-preview" = []
diff --git a/services/mgmt/storagesync/Cargo.toml b/services/mgmt/storagesync/Cargo.toml
index 35980dd7cb..9572707511 100644
--- a/services/mgmt/storagesync/Cargo.toml
+++ b/services/mgmt/storagesync/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-09-01"]
+default = ["package-2020-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-09-01" = []
 "package-2020-03-01" = []
diff --git a/services/mgmt/storsimple1200series/Cargo.toml b/services/mgmt/storsimple1200series/Cargo.toml
index eb85728bf2..7c18ad41a6 100644
--- a/services/mgmt/storsimple1200series/Cargo.toml
+++ b/services/mgmt/storsimple1200series/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-10"]
+default = ["package-2016-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-10" = []
diff --git a/services/mgmt/storsimple8000series/Cargo.toml b/services/mgmt/storsimple8000series/Cargo.toml
index f650bf190f..7ee026a961 100644
--- a/services/mgmt/storsimple8000series/Cargo.toml
+++ b/services/mgmt/storsimple8000series/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2017-06"]
+default = ["package-2017-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2017-06" = []
diff --git a/services/mgmt/streamanalytics/Cargo.toml b/services/mgmt/streamanalytics/Cargo.toml
index f51fea9004..a522bef709 100644
--- a/services/mgmt/streamanalytics/Cargo.toml
+++ b/services/mgmt/streamanalytics/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-pure-2020-03"]
+default = ["package-pure-2020-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-preview" = []
 "package-2020-03-preview" = []
diff --git a/services/mgmt/subscription/Cargo.toml b/services/mgmt/subscription/Cargo.toml
index 4a9edd0331..ddf805d6bd 100644
--- a/services/mgmt/subscription/Cargo.toml
+++ b/services/mgmt/subscription/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
 "package-2020-09" = []
diff --git a/services/mgmt/support/Cargo.toml b/services/mgmt/support/Cargo.toml
index a1876e5417..e1671b22d8 100644
--- a/services/mgmt/support/Cargo.toml
+++ b/services/mgmt/support/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-04"]
+default = ["package-2020-04", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-06" = []
 "package-2020-04" = []
diff --git a/services/mgmt/synapse/Cargo.toml b/services/mgmt/synapse/Cargo.toml
index e17ae9e833..665945995b 100644
--- a/services/mgmt/synapse/Cargo.toml
+++ b/services/mgmt/synapse/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-composite-v2"]
+default = ["package-composite-v2", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-composite-v2" = []
 "package-composite-v1" = []
diff --git a/services/mgmt/testbase/Cargo.toml b/services/mgmt/testbase/Cargo.toml
index d0126b3b9d..fd301c15b1 100644
--- a/services/mgmt/testbase/Cargo.toml
+++ b/services/mgmt/testbase/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-12-16-preview"]
+default = ["package-2020-12-16-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-12-16-preview" = []
diff --git a/services/mgmt/timeseriesinsights/Cargo.toml b/services/mgmt/timeseriesinsights/Cargo.toml
index 738e9d0e41..a86e70f5e4 100644
--- a/services/mgmt/timeseriesinsights/Cargo.toml
+++ b/services/mgmt/timeseriesinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-05-15"]
+default = ["package-2020-05-15", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-03" = []
 "package-preview-2021-06" = []
diff --git a/services/mgmt/trafficmanager/Cargo.toml b/services/mgmt/trafficmanager/Cargo.toml
index 99b3a80f42..53d3d72761 100644
--- a/services/mgmt/trafficmanager/Cargo.toml
+++ b/services/mgmt/trafficmanager/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-08"]
+default = ["package-2018-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-08" = []
 "package-2018-04" = []
diff --git a/services/mgmt/vi/Cargo.toml b/services/mgmt/vi/Cargo.toml
index 75068d94b3..71c9c2a8df 100644
--- a/services/mgmt/vi/Cargo.toml
+++ b/services/mgmt/vi/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-27-preview"]
+default = ["package-2021-10-27-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-27-preview" = []
 "package-2021-10-18-preview" = []
diff --git a/services/mgmt/videoanalyzer/Cargo.toml b/services/mgmt/videoanalyzer/Cargo.toml
index 87106c75f6..081968bdc0 100644
--- a/services/mgmt/videoanalyzer/Cargo.toml
+++ b/services/mgmt/videoanalyzer/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-preview-2021-11"]
+default = ["package-preview-2021-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-2021-11" = []
 "package-2021-05-01-preview" = []
diff --git a/services/mgmt/visualstudio/Cargo.toml b/services/mgmt/visualstudio/Cargo.toml
index 6b068dea54..36cfc8da4c 100644
--- a/services/mgmt/visualstudio/Cargo.toml
+++ b/services/mgmt/visualstudio/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2014-04-preview"]
+default = ["package-2014-04-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2014-04-preview" = []
diff --git a/services/mgmt/vmware/Cargo.toml b/services/mgmt/vmware/Cargo.toml
index 0aa3058f44..b62063e066 100644
--- a/services/mgmt/vmware/Cargo.toml
+++ b/services/mgmt/vmware/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-12-01"]
+default = ["package-2021-12-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-12-01" = []
 "package-2021-06-01" = []
diff --git a/services/mgmt/vmwarecloudsimple/Cargo.toml b/services/mgmt/vmwarecloudsimple/Cargo.toml
index c02dd1f618..0f36465aef 100644
--- a/services/mgmt/vmwarecloudsimple/Cargo.toml
+++ b/services/mgmt/vmwarecloudsimple/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-04-01"]
+default = ["package-2019-04-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-04-01" = []
diff --git a/services/mgmt/web/Cargo.toml b/services/mgmt/web/Cargo.toml
index cf6d0b2f98..2912dfcde3 100644
--- a/services/mgmt/web/Cargo.toml
+++ b/services/mgmt/web/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-02"]
+default = ["package-2021-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-02" = []
 "package-2021-01-15" = []
diff --git a/services/mgmt/webpubsub/Cargo.toml b/services/mgmt/webpubsub/Cargo.toml
index 2632bbb6cc..2445ab54e1 100644
--- a/services/mgmt/webpubsub/Cargo.toml
+++ b/services/mgmt/webpubsub/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-01"]
+default = ["package-2021-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-01" = []
 "package-2021-09-01-preview" = []
diff --git a/services/mgmt/windowsesu/Cargo.toml b/services/mgmt/windowsesu/Cargo.toml
index 31a106d5d7..a4982ad681 100644
--- a/services/mgmt/windowsesu/Cargo.toml
+++ b/services/mgmt/windowsesu/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-09-16-preview"]
+default = ["package-2019-09-16-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-09-16-preview" = []
diff --git a/services/mgmt/windowsiot/Cargo.toml b/services/mgmt/windowsiot/Cargo.toml
index 15a773e1aa..a00511c1a4 100644
--- a/services/mgmt/windowsiot/Cargo.toml
+++ b/services/mgmt/windowsiot/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-06"]
+default = ["package-2019-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-06" = []
 "package-2018-02-preview" = []
diff --git a/services/mgmt/workloadmonitor/Cargo.toml b/services/mgmt/workloadmonitor/Cargo.toml
index 744acef04b..97eac2da70 100644
--- a/services/mgmt/workloadmonitor/Cargo.toml
+++ b/services/mgmt/workloadmonitor/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-08-31-preview"]
+default = ["package-2018-08-31-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-08-31-preview" = []
 "package-2020-01-13-preview" = []
diff --git a/services/svc/appconfiguration/Cargo.toml b/services/svc/appconfiguration/Cargo.toml
index 86e78572a8..8d9983869b 100644
--- a/services/svc/appconfiguration/Cargo.toml
+++ b/services/svc/appconfiguration/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-07"]
+default = ["package-2019-07", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-07" = []
diff --git a/services/svc/applicationinsights/Cargo.toml b/services/svc/applicationinsights/Cargo.toml
index 5e0d763a7d..104c87febd 100644
--- a/services/svc/applicationinsights/Cargo.toml
+++ b/services/svc/applicationinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["v1"]
+default = ["v1", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "v1" = []
diff --git a/services/svc/attestation/Cargo.toml b/services/svc/attestation/Cargo.toml
index ac4e0e5c8a..d0ce26b95e 100644
--- a/services/svc/attestation/Cargo.toml
+++ b/services/svc/attestation/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-01"]
+default = ["package-2018-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-01" = []
 "package-2020-10-01" = []
diff --git a/services/svc/batch/Cargo.toml b/services/svc/batch/Cargo.toml
index 206bd24ae0..efa0a6c873 100644
--- a/services/svc/batch/Cargo.toml
+++ b/services/svc/batch/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-06.14.0"]
+default = ["package-2021-06.14.0", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-06.14.0" = []
 "package-2020-09.12.0" = []
diff --git a/services/svc/blobstorage/Cargo.toml b/services/svc/blobstorage/Cargo.toml
index a4f753184d..ba80be89cc 100644
--- a/services/svc/blobstorage/Cargo.toml
+++ b/services/svc/blobstorage/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10"]
+default = ["package-2020-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10" = []
 "package-2020-12" = []
diff --git a/services/svc/confidentialledger/Cargo.toml b/services/svc/confidentialledger/Cargo.toml
index 2bf89e72a8..f073a37a8b 100644
--- a/services/svc/confidentialledger/Cargo.toml
+++ b/services/svc/confidentialledger/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-0.1-preview-ledger"]
+default = ["package-0.1-preview-ledger", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-0.1-preview-ledger" = []
 "package-0.1-preview-identity" = []
diff --git a/services/svc/containerregistry/Cargo.toml b/services/svc/containerregistry/Cargo.toml
index 2b70ff9c69..40633b3143 100644
--- a/services/svc/containerregistry/Cargo.toml
+++ b/services/svc/containerregistry/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-08"]
+default = ["package-2019-08", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-08" = []
 "package-2019-07" = []
diff --git a/services/svc/cosmosdb/Cargo.toml b/services/svc/cosmosdb/Cargo.toml
index 9d06191400..220f3ef6fb 100644
--- a/services/svc/cosmosdb/Cargo.toml
+++ b/services/svc/cosmosdb/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-02"]
+default = ["package-2019-02", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-02" = []
diff --git a/services/svc/datalakeanalytics/Cargo.toml b/services/svc/datalakeanalytics/Cargo.toml
index dbe6a9eda1..67388429bd 100644
--- a/services/svc/datalakeanalytics/Cargo.toml
+++ b/services/svc/datalakeanalytics/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-catalog-2016-11"]
+default = ["package-catalog-2016-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-catalog-2016-11" = []
 "package-catalog-2015-10-preview" = []
diff --git a/services/svc/datalakestore/Cargo.toml b/services/svc/datalakestore/Cargo.toml
index 18ecffe486..560b0bb2ec 100644
--- a/services/svc/datalakestore/Cargo.toml
+++ b/services/svc/datalakestore/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2016-11"]
+default = ["package-2016-11", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2016-11" = []
 "package-2015-10-preview" = []
diff --git a/services/svc/deviceprovisioningservices/Cargo.toml b/services/svc/deviceprovisioningservices/Cargo.toml
index fdf021021e..5389c059d1 100644
--- a/services/svc/deviceprovisioningservices/Cargo.toml
+++ b/services/svc/deviceprovisioningservices/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-01"]
+default = ["package-2021-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-01" = []
diff --git a/services/svc/deviceupdate/Cargo.toml b/services/svc/deviceupdate/Cargo.toml
index 4603fa4037..469100580a 100644
--- a/services/svc/deviceupdate/Cargo.toml
+++ b/services/svc/deviceupdate/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-09-01"]
+default = ["package-2020-09-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-09-01" = []
diff --git a/services/svc/digitaltwins/Cargo.toml b/services/svc/digitaltwins/Cargo.toml
index d7201bdb39..9e8021334c 100644
--- a/services/svc/digitaltwins/Cargo.toml
+++ b/services/svc/digitaltwins/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10-31"]
+default = ["package-2020-10-31", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10-31" = []
 "package-2020-05-31-preview" = []
diff --git a/services/svc/eventgrid/Cargo.toml b/services/svc/eventgrid/Cargo.toml
index 160d751d5f..9aade05e25 100644
--- a/services/svc/eventgrid/Cargo.toml
+++ b/services/svc/eventgrid/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-01"]
+default = ["package-2018-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-01" = []
diff --git a/services/svc/filestorage/Cargo.toml b/services/svc/filestorage/Cargo.toml
index 24f43b9386..4f6e9fe0ab 100644
--- a/services/svc/filestorage/Cargo.toml
+++ b/services/svc/filestorage/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-10"]
+default = ["package-2020-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-10" = []
 "package-2021-02" = []
diff --git a/services/svc/graphrbac/Cargo.toml b/services/svc/graphrbac/Cargo.toml
index edcec6972b..6b01171272 100644
--- a/services/svc/graphrbac/Cargo.toml
+++ b/services/svc/graphrbac/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["1.6"]
+default = ["1.6", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "1.6" = []
diff --git a/services/svc/imds/Cargo.toml b/services/svc/imds/Cargo.toml
index ba5bf583b6..daaadf1709 100644
--- a/services/svc/imds/Cargo.toml
+++ b/services/svc/imds/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-10-01"]
+default = ["package-2018-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-10-01" = []
 "package-2019-02-01" = []
diff --git a/services/svc/iotcentral/Cargo.toml b/services/svc/iotcentral/Cargo.toml
index f3dd86d8a6..cd800d5dbf 100644
--- a/services/svc/iotcentral/Cargo.toml
+++ b/services/svc/iotcentral/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-1.0"]
+default = ["package-1.0", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-1.1-preview" = []
 "package-2021-04-30-preview" = []
diff --git a/services/svc/keyvault/Cargo.toml b/services/svc/keyvault/Cargo.toml
index a1751fcfc9..e62797254c 100644
--- a/services/svc/keyvault/Cargo.toml
+++ b/services/svc/keyvault/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-7.2"]
+default = ["package-7.2", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-preview-7.3-preview" = []
 "package-7.2" = []
diff --git a/services/svc/marketplacecatalog/Cargo.toml b/services/svc/marketplacecatalog/Cargo.toml
index 2711a1e961..330df87f8b 100644
--- a/services/svc/marketplacecatalog/Cargo.toml
+++ b/services/svc/marketplacecatalog/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-01"]
+default = ["package-2021-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-01" = []
diff --git a/services/svc/mixedreality/Cargo.toml b/services/svc/mixedreality/Cargo.toml
index 02a35737ee..1ebb2bf07f 100644
--- a/services/svc/mixedreality/Cargo.toml
+++ b/services/svc/mixedreality/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-01-01"]
+default = ["package-2021-01-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-0.2-preview.1" = []
 "package-2021-01-01" = []
diff --git a/services/svc/monitor/Cargo.toml b/services/svc/monitor/Cargo.toml
index 08852370a0..9a1309e821 100644
--- a/services/svc/monitor/Cargo.toml
+++ b/services/svc/monitor/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-09-preview"]
+default = ["package-2018-09-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-09-preview" = []
diff --git a/services/svc/operationalinsights/Cargo.toml b/services/svc/operationalinsights/Cargo.toml
index 4826cecbd7..dfefe5c272 100644
--- a/services/svc/operationalinsights/Cargo.toml
+++ b/services/svc/operationalinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["v1"]
+default = ["v1", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "v1" = []
diff --git a/services/svc/purview/Cargo.toml b/services/svc/purview/Cargo.toml
index 79520986db..de6a092921 100644
--- a/services/svc/purview/Cargo.toml
+++ b/services/svc/purview/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-12-01-preview"]
+default = ["package-2018-12-01-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-12-01-preview" = []
 "package-2021-07-01-preview" = []
diff --git a/services/svc/quantum/Cargo.toml b/services/svc/quantum/Cargo.toml
index 37f68b5251..c7ac4dcbea 100644
--- a/services/svc/quantum/Cargo.toml
+++ b/services/svc/quantum/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2019-11-04-preview"]
+default = ["package-2019-11-04-preview", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2019-11-04-preview" = []
 "package-2021-05-06-preview" = []
diff --git a/services/svc/queuestorage/Cargo.toml b/services/svc/queuestorage/Cargo.toml
index 97a87fb3b1..6780aa1ee0 100644
--- a/services/svc/queuestorage/Cargo.toml
+++ b/services/svc/queuestorage/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2018-03"]
+default = ["package-2018-03", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2018-03" = []
diff --git a/services/svc/schemaregistry/Cargo.toml b/services/svc/schemaregistry/Cargo.toml
index f897a0dd25..956ef10b5a 100644
--- a/services/svc/schemaregistry/Cargo.toml
+++ b/services/svc/schemaregistry/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10"]
+default = ["package-2021-10", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10" = []
diff --git a/services/svc/servicefabric/Cargo.toml b/services/svc/servicefabric/Cargo.toml
index 39cc7a4856..0515c24202 100644
--- a/services/svc/servicefabric/Cargo.toml
+++ b/services/svc/servicefabric/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["6.5"]
+default = ["6.5", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "6.5" = []
 "7.0" = []
diff --git a/services/svc/storagedatalake/Cargo.toml b/services/svc/storagedatalake/Cargo.toml
index 7b8447fa48..e587dbbf5f 100644
--- a/services/svc/storagedatalake/Cargo.toml
+++ b/services/svc/storagedatalake/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-06"]
+default = ["package-2020-06", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-06" = []
 "package-2020-10" = []
diff --git a/services/svc/synapse/Cargo.toml b/services/svc/synapse/Cargo.toml
index 4fde8e26f9..40fbfa1062 100644
--- a/services/svc/synapse/Cargo.toml
+++ b/services/svc/synapse/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-artifacts-composite-v1"]
+default = ["package-artifacts-composite-v1", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-artifacts-2021-07-01-preview" = []
 "package-artifacts-composite-v1" = []
diff --git a/services/svc/timeseriesinsights/Cargo.toml b/services/svc/timeseriesinsights/Cargo.toml
index 5f37bb0475..d06b934031 100644
--- a/services/svc/timeseriesinsights/Cargo.toml
+++ b/services/svc/timeseriesinsights/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,6 +18,8 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2020-07-31"]
+default = ["package-2020-07-31", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2020-07-31" = []
diff --git a/services/svc/webpubsub/Cargo.toml b/services/svc/webpubsub/Cargo.toml
index a441c3412f..2295041a35 100644
--- a/services/svc/webpubsub/Cargo.toml
+++ b/services/svc/webpubsub/Cargo.toml
@@ -5,10 +5,9 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-azure_core = { path = "../../../sdk/core", version = "0.1.0" }
+azure_core = { path = "../../../sdk/core", version = "0.1.0", default-features = false }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-reqwest = { version = "0.11", features = ["json"] }
 bytes = "1.0"
 thiserror = "1.0"
 http = "0.2"
@@ -19,7 +18,9 @@ azure_identity = { path = "../../../sdk/identity", version = "0.1.0" }
 tokio = { version = "1.0", features = ["macros"] }
 
 [features]
-default = ["package-2021-10-01"]
+default = ["package-2021-10-01", "enable_reqwest"]
+enable_reqwest = ["azure_core/enable_reqwest"]
+enable_reqwest_rustls = ["azure_core/enable_reqwest_rustls"]
 no-default-version = []
 "package-2021-10-01" = []
 "package-2021-08-01-preview" = []