diff --git a/apis/validator/sync_committee_contribution.yaml b/apis/validator/sync_committee_contribution.yaml
new file mode 100644
index 00000000..d4b4eb22
--- /dev/null
+++ b/apis/validator/sync_committee_contribution.yaml
@@ -0,0 +1,43 @@
+get:
+  tags:
+    - ValidatorRequiredApi
+    - Validator
+  operationId: "produceSyncCommitteeContribution"
+  summary: "Produce a sync committee contribution"
+  description: "Requests that the beacon node produce a sync committee contribution."
+  parameters:
+    - name: slot
+      in: query
+      required: true
+      description: "The slot for which a sync committee contribution should be created."
+      schema:
+        $ref: '../../beacon-node-oapi.yaml#/components/schemas/Uint64'
+    - name: subcommittee_index
+      in: query
+      description: "the subcommittee index for which to produce the contribution."
+      required: true
+      schema:
+        $ref: "../../beacon-node-oapi.yaml#/components/schemas/Uint64"
+    - name: beacon_block_root
+      in: query
+      description: "the block root for which to produce the contribution."
+      required: true
+      schema:
+        $ref: "../../beacon-node-oapi.yaml#/components/schemas/Root"
+  responses:
+    "200":
+      description: Success response
+      content:
+        application/json:
+          schema:
+            title: produceSyncCommitteeContributionResponse
+            type: object
+            properties:
+              data:
+                $ref: '../../beacon-node-oapi.yaml#/components/schemas/Altair.SyncCommitteeContribution'
+    "400":
+      $ref: '../../beacon-node-oapi.yaml#/components/responses/InvalidRequest'
+    "500":
+      $ref: '../../beacon-node-oapi.yaml#/components/responses/InternalError'
+    "503":
+      $ref: '../../beacon-node-oapi.yaml#/components/responses/CurrentlySyncing'
diff --git a/beacon-node-oapi.yaml b/beacon-node-oapi.yaml
index 1ceb3340..e7637c15 100644
--- a/beacon-node-oapi.yaml
+++ b/beacon-node-oapi.yaml
@@ -136,6 +136,8 @@ paths:
     $ref: "./apis/validator/beacon_committee_subscriptions.yaml"
   /eth/v1/validator/sync_committee_subscriptions:
     $ref: "./apis/validator/sync_committee_subscriptions.yaml"
+  /eth/v1/validator/sync_committee_contribution:
+    $ref: "./apis/validator/sync_committee_contribution.yaml"
   /eth/v1/validator/contribution_and_proofs:
     $ref: "./apis/validator/sync_committee_contribution_and_proof.yaml"
 
diff --git a/types/altair/sync_committee.yaml b/types/altair/sync_committee.yaml
index 3af5387b..80d55f71 100644
--- a/types/altair/sync_committee.yaml
+++ b/types/altair/sync_committee.yaml
@@ -70,9 +70,9 @@ Altair:
           - $ref: "../primitive.yaml#/Uint64"
           - description: "The slot at which the validator is providing a sync committee contribution."
       beacon_block_root:
-         allOf:
-           - $ref: '../primitive.yaml#/Root'
-           - description: "Block root for this contribution."
+        allOf:
+          - $ref: '../primitive.yaml#/Root'
+          - description: "Block root for this contribution."
       subcommittee_index:
         allOf:
           - $ref: '../primitive.yaml#/Uint64'
@@ -84,9 +84,8 @@ Altair:
           - example: "0x01"
       signature:
         allOf:
-         - $ref: '../primitive.yaml#/Signature'
-         - description: 'Signature by the validator(s) over the block root of `slot`'
-
+          - $ref: '../primitive.yaml#/Signature'
+          - description: 'Signature by the validator(s) over the block root of `slot`'
   ValidatorsByIndex:
     type: array
     items: