diff --git a/codegen/sdk-codegen/build.gradle.kts b/codegen/sdk-codegen/build.gradle.kts
index 496f3ac543682..b5bd26917125e 100644
--- a/codegen/sdk-codegen/build.gradle.kts
+++ b/codegen/sdk-codegen/build.gradle.kts
@@ -15,6 +15,7 @@
 
 import software.amazon.smithy.model.Model
 import software.amazon.smithy.model.shapes.ServiceShape
+import software.amazon.smithy.model.shapes.ShapeId
 import software.amazon.smithy.model.node.Node
 import software.amazon.smithy.gradle.tasks.SmithyBuild
 import software.amazon.smithy.aws.traits.ServiceTrait
@@ -102,6 +103,10 @@ tasks.register("generate-smithy-build") {
                     File("smithy-aws-typescript-codegen/src/main/resources/software/amazon/smithy/aws/typescript/codegen/package.json.template")
                             .readText()
             ).expectObjectNode()
+            val experimentalIdentityAndAuthServices = setOf(
+                ShapeId.from("com.amazonaws.codecatalyst#CodeCatalyst"),
+                ShapeId.from("com.amazonaws.sts#AWSSecurityTokenServiceV20110615"),
+            )
             val projectionContents = Node.objectNodeBuilder()
                     .withMember("imports", Node.fromStrings("${models.getAbsolutePath()}${File.separator}${file.name}"))
                     .withMember("plugins", Node.objectNode()
@@ -112,6 +117,7 @@ tasks.register("generate-smithy-build") {
                                     .withMember("packageJson", manifestOverwrites)
                                     .withMember("packageDescription", "AWS SDK for JavaScript "
                                         + clientName + " Client for Node.js, Browser and React Native")
+                                    .withMember("experimentalIdentityAndAuth", experimentalIdentityAndAuthServices.contains(service.getId()))
                                     .build()))
                     .build()
             projectionsBuilder.withMember(sdkId + "." + version.toLowerCase(), projectionContents)