diff --git a/notifications/build-tools/merged-coverage.gradle b/notifications/build-tools/merged-coverage.gradle
index 83fa44d2..03a3b6fc 100644
--- a/notifications/build-tools/merged-coverage.gradle
+++ b/notifications/build-tools/merged-coverage.gradle
@@ -15,6 +15,9 @@ allprojects {
 
 task jacocoReport(type: JacocoReport, group: 'verification') {
     description = 'Generates an aggregate report from all subprojects'
+    onlyIf {
+        gradle.taskGraph.hasTask("jacocoTestReport")
+    }
     gradle.projectsEvaluated {
         subprojects.each {
             jacocoReport.dependsOn it.tasks.withType(JacocoReport)
diff --git a/notifications/build.gradle b/notifications/build.gradle
index df186b08..62eac128 100644
--- a/notifications/build.gradle
+++ b/notifications/build.gradle
@@ -21,7 +21,7 @@ buildscript {
         }
         opensearch_no_snapshot = opensearch_version.replace("-SNAPSHOT","")
         common_utils_version = System.getProperty("common_utils.version", opensearch_build)
-        kotlin_version = System.getProperty("kotlin.version", "1.6.10")
+        kotlin_version = System.getProperty("kotlin.version", "1.8.21")
         junit_version = System.getProperty("junit.version", "5.7.2")
         aws_version = System.getProperty("aws.version", "1.12.48")
     }
@@ -39,7 +39,7 @@ buildscript {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlin_version}"
         classpath "org.jetbrains.kotlin:kotlin-allopen:${kotlin_version}"
         classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.22.0"
-        classpath "org.jacoco:org.jacoco.agent:0.8.5"
+        classpath "org.jacoco:org.jacoco.agent:0.8.7"
     }
 }
 
diff --git a/notifications/core-spi/build.gradle b/notifications/core-spi/build.gradle
index 7b70251d..14b9f707 100644
--- a/notifications/core-spi/build.gradle
+++ b/notifications/core-spi/build.gradle
@@ -20,8 +20,6 @@ repositories {
 }
 
 apply plugin: 'opensearch.java'
-apply plugin: 'opensearch.testclusters'
-apply plugin: 'opensearch.java-rest-test'
 apply plugin: 'org.jetbrains.kotlin.jvm'
 apply plugin: 'org.jetbrains.kotlin.plugin.allopen'
 
diff --git a/notifications/core-spi/src/main/kotlin/org/opensearch/notifications/spi/model/SecureDestinationSettings.kt b/notifications/core-spi/src/main/kotlin/org/opensearch/notifications/spi/model/SecureDestinationSettings.kt
index 62166ee6..0839daae 100644
--- a/notifications/core-spi/src/main/kotlin/org/opensearch/notifications/spi/model/SecureDestinationSettings.kt
+++ b/notifications/core-spi/src/main/kotlin/org/opensearch/notifications/spi/model/SecureDestinationSettings.kt
@@ -5,6 +5,6 @@
 
 package org.opensearch.notifications.spi.model
 
-import org.opensearch.common.settings.SecureString
+import org.opensearch.core.common.settings.SecureString
 
 data class SecureDestinationSettings(val emailUsername: SecureString, val emailPassword: SecureString)
diff --git a/notifications/core/build.gradle b/notifications/core/build.gradle
index 91df52b1..10abf4a6 100644
--- a/notifications/core/build.gradle
+++ b/notifications/core/build.gradle
@@ -74,14 +74,6 @@ publishing {
     }
 }
 
-tasks.register('integTest', RestIntegTestTask) {
-    description = "Run tests against a cluster that has security enabled"
-    testClassesDirs = sourceSets.test.output.classesDirs
-    classpath = sourceSets.test.runtimeClasspath
-    systemProperty 'tests.security.manager', 'false'
-}
-
-tasks.named("check").configure { dependsOn(integTest) }
 check.dependsOn jacocoTestReport
 
 // turn off javadoc as it barfs on Kotlin code
@@ -107,6 +99,11 @@ test {
     systemProperty 'tests.security.manager', 'false'
 }
 
+// disable for core, we don't need to run test cluster
+run {
+    onlyIf { false }
+}
+
 //TODO: see if this can be only set at top level and apply to subprojects, or we remove from top project if possible
 configurations.configureEach {
     if (it.state != Configuration.State.UNRESOLVED) return
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/NotificationCorePlugin.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/NotificationCorePlugin.kt
index a97e407e..cfffb924 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/NotificationCorePlugin.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/NotificationCorePlugin.kt
@@ -8,9 +8,9 @@ package org.opensearch.notifications.core
 import org.opensearch.client.Client
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver
 import org.opensearch.cluster.service.ClusterService
-import org.opensearch.common.io.stream.NamedWriteableRegistry
 import org.opensearch.common.settings.Setting
 import org.opensearch.common.settings.Settings
+import org.opensearch.core.common.io.stream.NamedWriteableRegistry
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.env.Environment
 import org.opensearch.env.NodeEnvironment
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationHttpClient.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationHttpClient.kt
index 5764f852..aab211fb 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationHttpClient.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationHttpClient.kt
@@ -22,6 +22,7 @@ import org.apache.http.impl.conn.PoolingHttpClientConnectionManager
 import org.apache.http.util.EntityUtils
 import org.opensearch.common.xcontent.XContentFactory
 import org.opensearch.common.xcontent.XContentType
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.setting.PluginSettings
 import org.opensearch.notifications.core.utils.OpenForTesting
 import org.opensearch.notifications.core.utils.logger
@@ -32,7 +33,6 @@ import org.opensearch.notifications.spi.model.destination.ChimeDestination
 import org.opensearch.notifications.spi.model.destination.CustomWebhookDestination
 import org.opensearch.notifications.spi.model.destination.SlackDestination
 import org.opensearch.notifications.spi.model.destination.WebhookDestination
-import org.opensearch.rest.RestStatus
 import java.io.IOException
 import java.nio.charset.StandardCharsets
 import java.util.Collections
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSesClient.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSesClient.kt
index c5917c0b..3ab92875 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSesClient.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSesClient.kt
@@ -15,6 +15,7 @@ import com.amazonaws.services.simpleemail.model.MailFromDomainNotVerifiedExcepti
 import com.amazonaws.services.simpleemail.model.MessageRejectedException
 import com.amazonaws.services.simpleemail.model.RawMessage
 import com.amazonaws.services.simpleemail.model.SendRawEmailRequest
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCorePlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.core.credentials.SesClientFactory
 import org.opensearch.notifications.core.setting.PluginSettings
@@ -23,7 +24,6 @@ import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.SesDestination
-import org.opensearch.rest.RestStatus
 import java.io.ByteArrayOutputStream
 import java.nio.ByteBuffer
 import java.util.Properties
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSmtpClient.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSmtpClient.kt
index 703b6453..d444cab6 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSmtpClient.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSmtpClient.kt
@@ -6,7 +6,8 @@
 package org.opensearch.notifications.core.client
 
 import com.sun.mail.util.MailConnectException
-import org.opensearch.common.settings.SecureString
+import org.opensearch.core.common.settings.SecureString
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.setting.PluginSettings
 import org.opensearch.notifications.core.utils.SecurityAccess
 import org.opensearch.notifications.core.utils.logger
@@ -14,7 +15,6 @@ import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.SecureDestinationSettings
 import org.opensearch.notifications.spi.model.destination.SmtpDestination
-import org.opensearch.rest.RestStatus
 import java.util.Properties
 import javax.mail.Authenticator
 import javax.mail.Message
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSnsClient.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSnsClient.kt
index 1b58b199..046d6e8f 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSnsClient.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/DestinationSnsClient.kt
@@ -24,13 +24,13 @@ import com.amazonaws.services.sns.model.KMSThrottlingException
 import com.amazonaws.services.sns.model.NotFoundException
 import com.amazonaws.services.sns.model.PlatformApplicationDisabledException
 import com.amazonaws.services.sns.model.PublishResult
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCorePlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.core.credentials.SnsClientFactory
 import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.SnsDestination
-import org.opensearch.rest.RestStatus
 
 /**
  * This class handles the SNS connections to the given Destination.
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/setting/PluginSettings.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/setting/PluginSettings.kt
index 6537ba5f..70401dee 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/setting/PluginSettings.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/setting/PluginSettings.kt
@@ -8,13 +8,13 @@ package org.opensearch.notifications.core.setting
 import org.opensearch.bootstrap.BootstrapInfo
 import org.opensearch.cluster.service.ClusterService
 import org.opensearch.common.settings.SecureSetting
-import org.opensearch.common.settings.SecureString
 import org.opensearch.common.settings.Setting
 import org.opensearch.common.settings.Setting.Property.Deprecated
 import org.opensearch.common.settings.Setting.Property.Dynamic
 import org.opensearch.common.settings.Setting.Property.Final
 import org.opensearch.common.settings.Setting.Property.NodeScope
 import org.opensearch.common.settings.Settings
+import org.opensearch.core.common.settings.SecureString
 import org.opensearch.notifications.core.NotificationCorePlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.core.NotificationCorePlugin.Companion.PLUGIN_NAME
 import org.opensearch.notifications.core.utils.OpenForTesting
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SesDestinationTransport.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SesDestinationTransport.kt
index 1da4bb7e..e79a52b0 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SesDestinationTransport.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SesDestinationTransport.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.notifications.core.transport
 
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.client.DestinationClientPool
 import org.opensearch.notifications.core.client.DestinationSesClient
 import org.opensearch.notifications.core.utils.OpenForTesting
@@ -12,7 +13,6 @@ import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.SesDestination
-import org.opensearch.rest.RestStatus
 import java.io.IOException
 import javax.mail.MessagingException
 import javax.mail.internet.AddressException
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SmtpDestinationTransport.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SmtpDestinationTransport.kt
index d8dfb4fb..903c26f7 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SmtpDestinationTransport.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SmtpDestinationTransport.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.notifications.core.transport
 
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.client.DestinationClientPool
 import org.opensearch.notifications.core.client.DestinationSmtpClient
 import org.opensearch.notifications.core.utils.OpenForTesting
@@ -12,7 +13,6 @@ import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.SmtpDestination
-import org.opensearch.rest.RestStatus
 import java.io.IOException
 import javax.mail.MessagingException
 import javax.mail.internet.AddressException
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SnsDestinationTransport.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SnsDestinationTransport.kt
index f7dc1afd..8abf0406 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SnsDestinationTransport.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/SnsDestinationTransport.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.notifications.core.transport
 
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.client.DestinationClientPool
 import org.opensearch.notifications.core.client.DestinationSnsClient
 import org.opensearch.notifications.core.utils.OpenForTesting
@@ -12,7 +13,6 @@ import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.SnsDestination
-import org.opensearch.rest.RestStatus
 import java.io.IOException
 
 /**
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/WebhookDestinationTransport.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/WebhookDestinationTransport.kt
index 2ebc4f68..258a5160 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/WebhookDestinationTransport.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/transport/WebhookDestinationTransport.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.notifications.core.transport
 
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.client.DestinationClientPool
 import org.opensearch.notifications.core.client.DestinationHttpClient
 import org.opensearch.notifications.core.utils.OpenForTesting
@@ -12,7 +13,6 @@ import org.opensearch.notifications.core.utils.logger
 import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.WebhookDestination
-import org.opensearch.rest.RestStatus
 import java.io.IOException
 
 /**
diff --git a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/utils/Helpers.kt b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/utils/Helpers.kt
index b6e6ef5f..c3e1fe46 100644
--- a/notifications/core/src/main/kotlin/org/opensearch/notifications/core/utils/Helpers.kt
+++ b/notifications/core/src/main/kotlin/org/opensearch/notifications/core/utils/Helpers.kt
@@ -7,7 +7,7 @@ package org.opensearch.notifications.core.utils
 
 import org.apache.logging.log4j.LogManager
 import org.apache.logging.log4j.Logger
-import org.opensearch.common.bytes.BytesReference
+import org.opensearch.core.common.bytes.BytesReference
 import org.opensearch.core.xcontent.XContentBuilder
 
 fun <T : Any> logger(forClass: Class<T>): Lazy<Logger> {
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/ChimeDestinationTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/ChimeDestinationTests.kt
index 46bf3a23..55456eee 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/ChimeDestinationTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/ChimeDestinationTests.kt
@@ -22,6 +22,7 @@ import org.junit.jupiter.api.assertThrows
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.Arguments
 import org.junit.jupiter.params.provider.MethodSource
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.client.DestinationHttpClient
 import org.opensearch.notifications.core.transport.DestinationTransportProvider
@@ -30,7 +31,6 @@ import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.ChimeDestination
 import org.opensearch.notifications.spi.model.destination.DestinationType
-import org.opensearch.rest.RestStatus
 import java.net.MalformedURLException
 import java.util.stream.Stream
 
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/CustomWebhookDestinationTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/CustomWebhookDestinationTests.kt
index a8f3fa68..c354a2c4 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/CustomWebhookDestinationTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/CustomWebhookDestinationTests.kt
@@ -25,6 +25,7 @@ import org.junit.jupiter.api.assertThrows
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.Arguments
 import org.junit.jupiter.params.provider.MethodSource
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.client.DestinationHttpClient
 import org.opensearch.notifications.core.transport.DestinationTransportProvider
@@ -33,7 +34,6 @@ import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.CustomWebhookDestination
 import org.opensearch.notifications.spi.model.destination.DestinationType
-import org.opensearch.rest.RestStatus
 import java.net.MalformedURLException
 import java.util.stream.Stream
 
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SlackDestinationTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SlackDestinationTests.kt
index bea8a0f5..8902ae50 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SlackDestinationTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SlackDestinationTests.kt
@@ -21,6 +21,7 @@ import org.junit.jupiter.api.assertThrows
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.Arguments
 import org.junit.jupiter.params.provider.MethodSource
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.client.DestinationHttpClient
 import org.opensearch.notifications.core.transport.DestinationTransportProvider
@@ -30,7 +31,6 @@ import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.ChimeDestination
 import org.opensearch.notifications.spi.model.destination.DestinationType
 import org.opensearch.notifications.spi.model.destination.SlackDestination
-import org.opensearch.rest.RestStatus
 import java.net.MalformedURLException
 import java.util.stream.Stream
 
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SmtpDestinationTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SmtpDestinationTests.kt
index 4b412c58..94270007 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SmtpDestinationTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SmtpDestinationTests.kt
@@ -12,7 +12,8 @@ import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.junit.jupiter.MockitoExtension
-import org.opensearch.common.settings.SecureString
+import org.opensearch.core.common.settings.SecureString
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.client.DestinationSmtpClient
 import org.opensearch.notifications.core.transport.DestinationTransportProvider
@@ -22,7 +23,6 @@ import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.SecureDestinationSettings
 import org.opensearch.notifications.spi.model.destination.DestinationType
 import org.opensearch.notifications.spi.model.destination.SmtpDestination
-import org.opensearch.rest.RestStatus
 import javax.mail.MessagingException
 
 @ExtendWith(MockitoExtension::class)
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SnsDestinationTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SnsDestinationTests.kt
index 8902e77e..4daa412d 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SnsDestinationTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/destinations/SnsDestinationTests.kt
@@ -15,6 +15,7 @@ import io.mockk.spyk
 import org.easymock.EasyMock
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.client.DestinationSnsClient
 import org.opensearch.notifications.core.credentials.SnsClientFactory
@@ -24,7 +25,6 @@ import org.opensearch.notifications.spi.model.DestinationMessageResponse
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.DestinationType
 import org.opensearch.notifications.spi.model.destination.SnsDestination
-import org.opensearch.rest.RestStatus
 
 internal class SnsDestinationTests {
 
diff --git a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/smtp/SmtpEmailTests.kt b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/smtp/SmtpEmailTests.kt
index b5abcd6a..c3bd0e91 100644
--- a/notifications/core/src/test/kotlin/org/opensearch/notifications/core/smtp/SmtpEmailTests.kt
+++ b/notifications/core/src/test/kotlin/org/opensearch/notifications/core/smtp/SmtpEmailTests.kt
@@ -7,13 +7,13 @@ package org.opensearch.notifications.core.smtp
 
 import org.junit.After
 import org.junit.jupiter.api.Test
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.core.NotificationCoreImpl
 import org.opensearch.notifications.core.transport.DestinationTransportProvider
 import org.opensearch.notifications.core.transport.SmtpDestinationTransport
 import org.opensearch.notifications.spi.model.MessageContent
 import org.opensearch.notifications.spi.model.destination.DestinationType
 import org.opensearch.notifications.spi.model.destination.SmtpDestination
-import org.opensearch.rest.RestStatus
 import org.springframework.integration.test.mail.TestMailServer
 import kotlin.test.assertEquals
 
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/NotificationPlugin.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/NotificationPlugin.kt
index 4c75f80f..cefbc43b 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/NotificationPlugin.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/NotificationPlugin.kt
@@ -11,7 +11,6 @@ import org.opensearch.client.Client
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver
 import org.opensearch.cluster.node.DiscoveryNodes
 import org.opensearch.cluster.service.ClusterService
-import org.opensearch.common.io.stream.NamedWriteableRegistry
 import org.opensearch.common.settings.ClusterSettings
 import org.opensearch.common.settings.IndexScopedSettings
 import org.opensearch.common.settings.Setting
@@ -19,6 +18,7 @@ import org.opensearch.common.settings.Settings
 import org.opensearch.common.settings.SettingsFilter
 import org.opensearch.commons.notifications.action.NotificationsActions
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.common.io.stream.NamedWriteableRegistry
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.env.Environment
 import org.opensearch.env.NodeEnvironment
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/action/PluginBaseAction.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/action/PluginBaseAction.kt
index 7683705e..92987aff 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/action/PluginBaseAction.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/action/PluginBaseAction.kt
@@ -16,17 +16,17 @@ import org.opensearch.action.ActionResponse
 import org.opensearch.action.support.ActionFilters
 import org.opensearch.action.support.HandledTransportAction
 import org.opensearch.client.Client
-import org.opensearch.common.io.stream.Writeable
 import org.opensearch.common.util.concurrent.ThreadContext
 import org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT
 import org.opensearch.commons.authuser.User
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.common.io.stream.Writeable
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.index.IndexNotFoundException
 import org.opensearch.index.engine.VersionConflictEngineException
 import org.opensearch.indices.InvalidIndexNameException
 import org.opensearch.notifications.NotificationPlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.metrics.Metrics
-import org.opensearch.rest.RestStatus
 import org.opensearch.tasks.Task
 import org.opensearch.transport.TransportService
 import java.io.IOException
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigIndexingActions.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigIndexingActions.kt
index 8040439f..21242476 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigIndexingActions.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigIndexingActions.kt
@@ -32,12 +32,12 @@ import org.opensearch.commons.notifications.model.SmtpAccount
 import org.opensearch.commons.notifications.model.Sns
 import org.opensearch.commons.notifications.model.Webhook
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.metrics.Metrics
 import org.opensearch.notifications.model.DocMetadata
 import org.opensearch.notifications.model.NotificationConfigDoc
 import org.opensearch.notifications.security.UserAccess
-import org.opensearch.rest.RestStatus
 import java.time.Instant
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigOperations.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigOperations.kt
index 0244229c..ba44fcef 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigOperations.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigOperations.kt
@@ -6,9 +6,9 @@ package org.opensearch.notifications.index
 
 import org.opensearch.commons.notifications.action.GetNotificationConfigRequest
 import org.opensearch.commons.notifications.model.NotificationConfigSearchResult
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.model.NotificationConfigDoc
 import org.opensearch.notifications.model.NotificationConfigDocInfo
-import org.opensearch.rest.RestStatus
 
 /**
  * Interface for config Operations.
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigQueryHelper.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigQueryHelper.kt
index 98171118..93049399 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigQueryHelper.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/ConfigQueryHelper.kt
@@ -33,12 +33,12 @@ import org.opensearch.commons.notifications.model.ConfigType.SLACK
 import org.opensearch.commons.notifications.model.ConfigType.SMTP_ACCOUNT
 import org.opensearch.commons.notifications.model.ConfigType.SNS
 import org.opensearch.commons.notifications.model.ConfigType.WEBHOOK
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.index.query.BoolQueryBuilder
 import org.opensearch.index.query.QueryBuilder
 import org.opensearch.index.query.QueryBuilders
 import org.opensearch.notifications.NotificationPlugin.Companion.TEXT_QUERY_TAG
 import org.opensearch.notifications.model.DocMetadata.Companion.METADATA_TAG
-import org.opensearch.rest.RestStatus
 
 /**
  * Helper class for Get operations.
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/EventQueryHelper.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/EventQueryHelper.kt
index adec3bb7..30d784dc 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/EventQueryHelper.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/EventQueryHelper.kt
@@ -24,12 +24,12 @@ import org.opensearch.commons.notifications.NotificationConstants.STATUS_TEXT_TA
 import org.opensearch.commons.notifications.NotificationConstants.TAGS_TAG
 import org.opensearch.commons.notifications.NotificationConstants.TITLE_TAG
 import org.opensearch.commons.notifications.NotificationConstants.UPDATED_TIME_TAG
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.index.query.BoolQueryBuilder
 import org.opensearch.index.query.QueryBuilder
 import org.opensearch.index.query.QueryBuilders
 import org.opensearch.notifications.NotificationPlugin.Companion.TEXT_QUERY_TAG
 import org.opensearch.notifications.model.DocMetadata.Companion.METADATA_TAG
-import org.opensearch.rest.RestStatus
 
 /**
  * Helper class for Get operations.
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/NotificationConfigIndex.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/NotificationConfigIndex.kt
index fe76dcf6..7051e798 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/NotificationConfigIndex.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/index/NotificationConfigIndex.kt
@@ -33,6 +33,7 @@ import org.opensearch.commons.notifications.model.NotificationConfigInfo
 import org.opensearch.commons.notifications.model.NotificationConfigSearchResult
 import org.opensearch.commons.notifications.model.SearchResults
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.index.query.BoolQueryBuilder
 import org.opensearch.index.query.QueryBuilders
@@ -46,7 +47,6 @@ import org.opensearch.notifications.model.NotificationConfigDocInfo
 import org.opensearch.notifications.settings.PluginSettings
 import org.opensearch.notifications.util.SecureIndexClient
 import org.opensearch.notifications.util.SuspendUtils.Companion.suspendUntilTimeout
-import org.opensearch.rest.RestStatus
 import org.opensearch.script.Script
 import org.opensearch.search.SearchHit
 import org.opensearch.search.builder.SearchSourceBuilder
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/DocMetadata.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/DocMetadata.kt
index 13c99037..7b4b95ef 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/DocMetadata.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/DocMetadata.kt
@@ -5,7 +5,6 @@
 
 package org.opensearch.notifications.model
 
-import org.opensearch.common.xcontent.XContentParserUtils
 import org.opensearch.commons.notifications.NotificationConstants.CREATED_TIME_TAG
 import org.opensearch.commons.notifications.NotificationConstants.UPDATED_TIME_TAG
 import org.opensearch.commons.utils.logger
@@ -13,6 +12,7 @@ import org.opensearch.commons.utils.stringList
 import org.opensearch.core.xcontent.ToXContent
 import org.opensearch.core.xcontent.XContentBuilder
 import org.opensearch.core.xcontent.XContentParser
+import org.opensearch.core.xcontent.XContentParserUtils
 import java.time.Instant
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/NotificationConfigDoc.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/NotificationConfigDoc.kt
index f2162ac2..3a3b7cf7 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/NotificationConfigDoc.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/NotificationConfigDoc.kt
@@ -5,13 +5,13 @@
 package org.opensearch.notifications.model
 
 import org.opensearch.common.xcontent.XContentFactory
-import org.opensearch.common.xcontent.XContentParserUtils
 import org.opensearch.commons.notifications.NotificationConstants.CONFIG_TAG
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.utils.logger
 import org.opensearch.core.xcontent.ToXContent
 import org.opensearch.core.xcontent.XContentBuilder
 import org.opensearch.core.xcontent.XContentParser
+import org.opensearch.core.xcontent.XContentParserUtils
 import org.opensearch.notifications.model.DocMetadata.Companion.METADATA_TAG
 import java.io.IOException
 
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/SendTestNotificationRequest.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/SendTestNotificationRequest.kt
index 5619a963..20fb5023 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/SendTestNotificationRequest.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/model/SendTestNotificationRequest.kt
@@ -8,16 +8,16 @@ package org.opensearch.notifications.model
 import org.opensearch.action.ActionRequest
 import org.opensearch.action.ActionRequestValidationException
 import org.opensearch.action.ValidateActions
-import org.opensearch.common.io.stream.StreamInput
-import org.opensearch.common.io.stream.StreamOutput
-import org.opensearch.common.io.stream.Writeable
-import org.opensearch.common.xcontent.XContentParserUtils
 import org.opensearch.commons.notifications.NotificationConstants.CONFIG_ID_TAG
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.common.io.stream.StreamInput
+import org.opensearch.core.common.io.stream.StreamOutput
+import org.opensearch.core.common.io.stream.Writeable
 import org.opensearch.core.xcontent.ToXContent
 import org.opensearch.core.xcontent.ToXContentObject
 import org.opensearch.core.xcontent.XContentBuilder
 import org.opensearch.core.xcontent.XContentParser
+import org.opensearch.core.xcontent.XContentParserUtils
 import java.io.IOException
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationChannelListRestHandler.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationChannelListRestHandler.kt
index 0495bff1..926b61ae 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationChannelListRestHandler.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationChannelListRestHandler.kt
@@ -8,6 +8,7 @@ package org.opensearch.notifications.resthandler
 import org.opensearch.client.node.NodeClient
 import org.opensearch.commons.notifications.NotificationsPluginInterface
 import org.opensearch.commons.notifications.action.GetChannelListRequest
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.metrics.Metrics
 import org.opensearch.rest.BaseRestHandler.RestChannelConsumer
@@ -15,7 +16,6 @@ import org.opensearch.rest.BytesRestResponse
 import org.opensearch.rest.RestHandler.Route
 import org.opensearch.rest.RestRequest
 import org.opensearch.rest.RestRequest.Method.GET
-import org.opensearch.rest.RestStatus
 import org.opensearch.rest.action.RestToXContentListener
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationConfigRestHandler.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationConfigRestHandler.kt
index c6756185..de8e4a48 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationConfigRestHandler.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationConfigRestHandler.kt
@@ -19,6 +19,7 @@ import org.opensearch.commons.notifications.action.GetNotificationConfigRequest
 import org.opensearch.commons.notifications.action.UpdateNotificationConfigRequest
 import org.opensearch.commons.utils.contentParserNextToken
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.LOG_PREFIX
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.index.ConfigQueryHelper
@@ -31,7 +32,6 @@ import org.opensearch.rest.RestRequest.Method.DELETE
 import org.opensearch.rest.RestRequest.Method.GET
 import org.opensearch.rest.RestRequest.Method.POST
 import org.opensearch.rest.RestRequest.Method.PUT
-import org.opensearch.rest.RestStatus
 import org.opensearch.rest.action.RestToXContentListener
 import org.opensearch.search.sort.SortOrder
 
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationFeaturesRestHandler.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationFeaturesRestHandler.kt
index 8439243e..6364cd2b 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationFeaturesRestHandler.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationFeaturesRestHandler.kt
@@ -8,6 +8,7 @@ package org.opensearch.notifications.resthandler
 import org.opensearch.client.node.NodeClient
 import org.opensearch.commons.notifications.NotificationsPluginInterface
 import org.opensearch.commons.notifications.action.GetPluginFeaturesRequest
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.metrics.Metrics
 import org.opensearch.rest.BaseRestHandler.RestChannelConsumer
@@ -15,7 +16,6 @@ import org.opensearch.rest.BytesRestResponse
 import org.opensearch.rest.RestHandler.Route
 import org.opensearch.rest.RestRequest
 import org.opensearch.rest.RestRequest.Method.GET
-import org.opensearch.rest.RestStatus
 import org.opensearch.rest.action.RestToXContentListener
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationStatsRestHandler.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationStatsRestHandler.kt
index 2c599e03..856a928b 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationStatsRestHandler.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/NotificationStatsRestHandler.kt
@@ -6,6 +6,7 @@
 package org.opensearch.notifications.resthandler
 
 import org.opensearch.client.node.NodeClient
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.metrics.Metrics
 import org.opensearch.rest.BaseRestHandler
@@ -14,7 +15,6 @@ import org.opensearch.rest.BytesRestResponse
 import org.opensearch.rest.RestHandler.Route
 import org.opensearch.rest.RestRequest
 import org.opensearch.rest.RestRequest.Method.GET
-import org.opensearch.rest.RestStatus
 
 /**
  * Rest handler for getting notifications backend stats
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/RestResponseToXContentListener.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/RestResponseToXContentListener.kt
index ff9f537f..dc165de8 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/RestResponseToXContentListener.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/RestResponseToXContentListener.kt
@@ -6,12 +6,12 @@
 package org.opensearch.notifications.resthandler
 
 import org.opensearch.commons.notifications.action.BaseResponse
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.core.xcontent.XContentBuilder
 import org.opensearch.notifications.metrics.Metrics
 import org.opensearch.rest.BytesRestResponse
 import org.opensearch.rest.RestChannel
 import org.opensearch.rest.RestResponse
-import org.opensearch.rest.RestStatus
 import org.opensearch.rest.action.RestToXContentListener
 
 /**
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/SendTestMessageRestHandler.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/SendTestMessageRestHandler.kt
index 5963d6b5..d6d30e9b 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/SendTestMessageRestHandler.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/resthandler/SendTestMessageRestHandler.kt
@@ -7,6 +7,7 @@ package org.opensearch.notifications.resthandler
 
 import org.opensearch.client.node.NodeClient
 import org.opensearch.commons.notifications.NotificationConstants.CONFIG_ID_TAG
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.action.SendTestNotificationAction
 import org.opensearch.notifications.metrics.Metrics
@@ -17,7 +18,6 @@ import org.opensearch.rest.RestHandler.ReplacedRoute
 import org.opensearch.rest.RestRequest
 import org.opensearch.rest.RestRequest.Method.GET
 import org.opensearch.rest.RestRequest.Method.POST
-import org.opensearch.rest.RestStatus
 
 /**
  * Rest handler for getting notification features.
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/security/UserAccessManager.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/security/UserAccessManager.kt
index 623ec359..59e6976f 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/security/UserAccessManager.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/security/UserAccessManager.kt
@@ -7,8 +7,8 @@ package org.opensearch.notifications.security
 
 import org.opensearch.OpenSearchStatusException
 import org.opensearch.commons.authuser.User
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.settings.PluginSettings
-import org.opensearch.rest.RestStatus
 
 /**
  * Class for checking/filtering user access.
diff --git a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/send/SendMessageActionHelper.kt b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/send/SendMessageActionHelper.kt
index 2e1f6f1c..19b0f2f8 100644
--- a/notifications/notifications/src/main/kotlin/org/opensearch/notifications/send/SendMessageActionHelper.kt
+++ b/notifications/notifications/src/main/kotlin/org/opensearch/notifications/send/SendMessageActionHelper.kt
@@ -36,6 +36,7 @@ import org.opensearch.commons.notifications.model.SmtpAccount
 import org.opensearch.commons.notifications.model.Sns
 import org.opensearch.commons.notifications.model.Webhook
 import org.opensearch.commons.utils.logger
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.core.xcontent.ToXContent
 import org.opensearch.notifications.CoreProvider
 import org.opensearch.notifications.NotificationPlugin.Companion.LOG_PREFIX
@@ -52,7 +53,6 @@ import org.opensearch.notifications.spi.model.destination.SesDestination
 import org.opensearch.notifications.spi.model.destination.SlackDestination
 import org.opensearch.notifications.spi.model.destination.SmtpDestination
 import org.opensearch.notifications.spi.model.destination.SnsDestination
-import org.opensearch.rest.RestStatus
 import java.io.ByteArrayOutputStream
 
 /**
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/PluginRestTestCase.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/PluginRestTestCase.kt
index 225fe080..458bd69e 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/PluginRestTestCase.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/PluginRestTestCase.kt
@@ -21,11 +21,11 @@ import org.opensearch.common.xcontent.XContentType
 import org.opensearch.commons.ConfigConstants
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.rest.SecureRestClientBuilder
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.core.xcontent.DeprecationHandler
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.notifications.NotificationPlugin
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 import org.opensearch.test.rest.OpenSearchRestTestCase
 import java.io.IOException
 import java.nio.file.Files
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/SecurityNotificationIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/SecurityNotificationIT.kt
index 4342a4d6..313f6480 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/SecurityNotificationIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/SecurityNotificationIT.kt
@@ -14,11 +14,11 @@ import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.Slack
 import org.opensearch.commons.rest.SecureRestClientBuilder
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.notifications.NotificationPlugin
 import org.opensearch.notifications.verifyChannelIdEquals
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class SecurityNotificationIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/bwc/NotificationsBackwardsCompatibilityIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/bwc/NotificationsBackwardsCompatibilityIT.kt
index 76f0e183..5e808c78 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/bwc/NotificationsBackwardsCompatibilityIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/bwc/NotificationsBackwardsCompatibilityIT.kt
@@ -6,10 +6,10 @@
 package org.opensearch.integtest.bwc
 
 import org.opensearch.common.settings.Settings
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class NotificationsBackwardsCompatibilityIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/ChimeNotificationConfigCrudIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/ChimeNotificationConfigCrudIT.kt
index f708a6d2..3707bb83 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/ChimeNotificationConfigCrudIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/ChimeNotificationConfigCrudIT.kt
@@ -8,11 +8,11 @@ import org.junit.Assert
 import org.opensearch.commons.notifications.model.Chime
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class ChimeNotificationConfigCrudIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/CreateNotificationConfigIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/CreateNotificationConfigIT.kt
index 2d86dfe6..b7797697 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/CreateNotificationConfigIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/CreateNotificationConfigIT.kt
@@ -13,11 +13,11 @@ import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.Slack
 import org.opensearch.commons.notifications.model.SmtpAccount
 import org.opensearch.commons.notifications.model.Webhook
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class CreateNotificationConfigIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/DeleteNotificationConfigIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/DeleteNotificationConfigIT.kt
index 12d84ef4..fcc764f8 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/DeleteNotificationConfigIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/DeleteNotificationConfigIT.kt
@@ -6,12 +6,12 @@
 package org.opensearch.integtest.config
 
 import org.junit.Assert
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifyMultiConfigIdEquals
 import org.opensearch.notifications.verifySingleConfigIdEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class DeleteNotificationConfigIT : PluginRestTestCase() {
     private val charPool: List<Char> = ('a'..'z') + ('A'..'Z') + ('0'..'9')
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/EmailNotificationConfigCrudIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/EmailNotificationConfigCrudIT.kt
index fb9b7912..3cd638c2 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/EmailNotificationConfigCrudIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/EmailNotificationConfigCrudIT.kt
@@ -14,6 +14,7 @@ import org.opensearch.commons.notifications.model.MethodType
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.SesAccount
 import org.opensearch.commons.notifications.model.SmtpAccount
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifyMultiConfigEquals
@@ -21,7 +22,6 @@ import org.opensearch.notifications.verifyMultiConfigIdEquals
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.notifications.verifySingleConfigIdEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class EmailNotificationConfigCrudIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/QueryNotificationConfigIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/QueryNotificationConfigIT.kt
index e15bc1b2..a926463d 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/QueryNotificationConfigIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/QueryNotificationConfigIT.kt
@@ -9,6 +9,7 @@ import org.junit.Assert
 import org.opensearch.commons.notifications.model.Chime
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifyMultiConfigIdEquals
@@ -16,7 +17,6 @@ import org.opensearch.notifications.verifyOrderedConfigList
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.notifications.verifySingleConfigIdEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 import java.time.Instant
 
 class QueryNotificationConfigIT : PluginRestTestCase() {
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SlackNotificationConfigCrudIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SlackNotificationConfigCrudIT.kt
index 9fbcdfbb..2b51f39a 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SlackNotificationConfigCrudIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SlackNotificationConfigCrudIT.kt
@@ -9,11 +9,11 @@ import org.junit.Assert
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.Slack
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class SlackNotificationConfigCrudIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SnsNotificationConfigCrudIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SnsNotificationConfigCrudIT.kt
index 2300dbcf..10b09f3a 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SnsNotificationConfigCrudIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/SnsNotificationConfigCrudIT.kt
@@ -9,11 +9,11 @@ import org.junit.Assert
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.Sns
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class SnsNotificationConfigCrudIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/WebhookNotificationConfigCrudIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/WebhookNotificationConfigCrudIT.kt
index 939a1647..893a64fe 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/WebhookNotificationConfigCrudIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/config/WebhookNotificationConfigCrudIT.kt
@@ -9,11 +9,11 @@ import org.junit.Assert
 import org.opensearch.commons.notifications.model.ConfigType
 import org.opensearch.commons.notifications.model.NotificationConfig
 import org.opensearch.commons.notifications.model.Webhook
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifySingleConfigEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class WebhookNotificationConfigCrudIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetNotificationChannelListIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetNotificationChannelListIT.kt
index 09324734..339ea038 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetNotificationChannelListIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetNotificationChannelListIT.kt
@@ -6,11 +6,11 @@
 package org.opensearch.integtest.features
 
 import org.opensearch.commons.notifications.model.ConfigType
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.notifications.verifyChannelIdEquals
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class GetNotificationChannelListIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetPluginFeaturesIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetPluginFeaturesIT.kt
index ebc09c5d..0a40cf51 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetPluginFeaturesIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/features/GetPluginFeaturesIT.kt
@@ -7,10 +7,10 @@ package org.opensearch.integtest.features
 
 import org.junit.Assert
 import org.opensearch.commons.notifications.model.ConfigType
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 class GetPluginFeaturesIT : PluginRestTestCase() {
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageRestHandlerIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageRestHandlerIT.kt
index bcbde29f..bb1d0949 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageRestHandlerIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageRestHandlerIT.kt
@@ -8,10 +8,10 @@ package org.opensearch.integtest.send
 import org.junit.Assert
 import org.opensearch.commons.notifications.model.MethodType
 import org.opensearch.commons.notifications.model.SmtpAccount
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 
 internal class SendTestMessageRestHandlerIT : PluginRestTestCase() {
     @Suppress("EmptyFunctionBlock")
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageWithMockServerIT.kt b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageWithMockServerIT.kt
index 4cbb03bd..74ed2d94 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageWithMockServerIT.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/integtest/send/SendTestMessageWithMockServerIT.kt
@@ -11,10 +11,10 @@ import com.sun.net.httpserver.HttpServer
 import org.junit.AfterClass
 import org.junit.Assert
 import org.junit.BeforeClass
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.integtest.PluginRestTestCase
 import org.opensearch.notifications.NotificationPlugin.Companion.PLUGIN_BASE_URI
 import org.opensearch.rest.RestRequest
-import org.opensearch.rest.RestStatus
 import java.net.InetAddress
 import java.net.InetSocketAddress
 
diff --git a/notifications/notifications/src/test/kotlin/org/opensearch/notifications/action/PluginActionTests.kt b/notifications/notifications/src/test/kotlin/org/opensearch/notifications/action/PluginActionTests.kt
index 8c84741c..03004299 100644
--- a/notifications/notifications/src/test/kotlin/org/opensearch/notifications/action/PluginActionTests.kt
+++ b/notifications/notifications/src/test/kotlin/org/opensearch/notifications/action/PluginActionTests.kt
@@ -43,10 +43,10 @@ import org.opensearch.commons.notifications.model.EventStatus
 import org.opensearch.commons.notifications.model.NotificationConfigSearchResult
 import org.opensearch.commons.notifications.model.NotificationEvent
 import org.opensearch.commons.notifications.model.SeverityType
+import org.opensearch.core.rest.RestStatus
 import org.opensearch.core.xcontent.NamedXContentRegistry
 import org.opensearch.notifications.index.ConfigIndexingActions
 import org.opensearch.notifications.send.SendMessageActionHelper
-import org.opensearch.rest.RestStatus
 import org.opensearch.tasks.Task
 import org.opensearch.transport.TransportService
 import kotlin.test.assertEquals