diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsAuthPlugin.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsAuthPlugin.java
index a574667f67319..38f995444a815 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsAuthPlugin.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsAuthPlugin.java
@@ -43,11 +43,13 @@
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Configure clients with AWS auth configurations and plugin.
  */
 // TODO: Think about AWS Auth supported for only some operations and not all, when not AWS service, with say @auth([])
+@SmithyInternalApi
 public final class AddAwsAuthPlugin implements TypeScriptIntegration {
     static final String STS_CLIENT_PREFIX = "sts-client-";
     static final String ROLE_ASSUMERS_FILE = "defaultRoleAssumers";
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsRuntimeConfig.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsRuntimeConfig.java
index cd3213bde6925..75e4c61b0c138 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsRuntimeConfig.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddAwsRuntimeConfig.java
@@ -33,6 +33,7 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 // TODO: This javadoc is specific to needs of AWS client. However it has elements that would be needed by non-AWS
 // clients too, like logger, region for SigV4. We should refactor these into different Integration or rename this
@@ -74,6 +75,7 @@
  *     <li>logger: Sets to empty as logger is passed in client configuration</li>
  * </ul>
  */
+@SmithyInternalApi
 public final class AddAwsRuntimeConfig implements TypeScriptIntegration {
 
     private static final Logger LOGGER = Logger.getLogger(AddAwsRuntimeConfig.class.getName());
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBodyChecksumGeneratorDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBodyChecksumGeneratorDependency.java
index 4296f972b0171..0a9f986e4d5de 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBodyChecksumGeneratorDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBodyChecksumGeneratorDependency.java
@@ -29,10 +29,12 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.MapUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds blobReader dependency if needed.
  */
+@SmithyInternalApi
 public class AddBodyChecksumGeneratorDependency implements TypeScriptIntegration {
     private static final Set<String> SERVICE_IDS = SetUtils.of("Glacier");
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBuiltinPlugins.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBuiltinPlugins.java
index f9561dda282c4..d23a00be70413 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBuiltinPlugins.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddBuiltinPlugins.java
@@ -31,10 +31,12 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds all built-in runtime client plugins to clients.
  */
+@SmithyInternalApi
 public class AddBuiltinPlugins implements TypeScriptIntegration {
     private static final Set<String> ROUTE_53_ID_MEMBERS = SetUtils.of("DelegationSetId", "HostedZoneId", "Id");
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddCrossRegionCopyingPlugin.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddCrossRegionCopyingPlugin.java
index cc3faa8e8109b..7004ccdfb91fc 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddCrossRegionCopyingPlugin.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddCrossRegionCopyingPlugin.java
@@ -25,7 +25,9 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
+@SmithyInternalApi
 public class AddCrossRegionCopyingPlugin implements TypeScriptIntegration {
     private static final Set<String> SHARED_PRESIGNED_URL_OPERATIONS = SetUtils.of(
         "CopyDBClusterSnapshot",
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddDocumentClientPlugin.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddDocumentClientPlugin.java
index 11655775ea8ac..a2302816dcd8e 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddDocumentClientPlugin.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddDocumentClientPlugin.java
@@ -32,10 +32,12 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Generates Client and Commands for DynamoDB Document Client.
  */
+@SmithyInternalApi
 public class AddDocumentClientPlugin implements TypeScriptIntegration {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddEventStreamHandlingDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddEventStreamHandlingDependency.java
index 95b93cc78593c..8a64fcd2b88ad 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddEventStreamHandlingDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddEventStreamHandlingDependency.java
@@ -37,11 +37,13 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds runtime client plugins that handle the eventstream flow in request,
  * including eventstream payload signing.
  */
+@SmithyInternalApi
 public class AddEventStreamHandlingDependency implements TypeScriptIntegration {
     @Override
     public List<RuntimeClientPlugin> getClientPlugins() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddHttp2Dependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddHttp2Dependency.java
index 1f0a7dc104dfa..93b00c534b3cd 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddHttp2Dependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddHttp2Dependency.java
@@ -29,7 +29,9 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
+@SmithyInternalApi
 public class AddHttp2Dependency implements TypeScriptIntegration {
     @Override
     public Map<String, Consumer<TypeScriptWriter>> getRuntimeConfigWriters(
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddMd5HashDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddMd5HashDependency.java
index cbf546c2dc3cd..62d82ce84f0c7 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddMd5HashDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddMd5HashDependency.java
@@ -30,10 +30,12 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.MapUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds Md5Hash if needed.
  */
+@SmithyInternalApi
 public class AddMd5HashDependency implements TypeScriptIntegration {
     private static final Set<String> SERVICE_IDS = SetUtils.of("S3", "SQS");
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddOmitRetryHeadersDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddOmitRetryHeadersDependency.java
index 1c3575a4ea1ee..07e0104ecef58 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddOmitRetryHeadersDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddOmitRetryHeadersDependency.java
@@ -25,8 +25,10 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 
+@SmithyInternalApi
 public class AddOmitRetryHeadersDependency implements TypeScriptIntegration {
     private static final Set<String> SERVICE_IDS = SetUtils.of(
         "ConnectParticipant", // P43593766
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddProtocols.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddProtocols.java
index b3ded4a09b7ef..f1ca46501bbbb 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddProtocols.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddProtocols.java
@@ -19,10 +19,12 @@
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds all built-in AWS protocols.
  */
+@SmithyInternalApi
 public class AddProtocols implements TypeScriptIntegration {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3Config.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3Config.java
index 92a3c091931e4..68c5bfd16bb3b 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3Config.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3Config.java
@@ -38,10 +38,12 @@
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * AWS S3 client configuration.
  */
+@SmithyInternalApi
 public final class AddS3Config implements TypeScriptIntegration {
 
     private static final Set<String> S3_MD5_OPERATIONS = SetUtils.of(
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3ControlDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3ControlDependency.java
index ef86fa73f889d..5fcf46f5cd6f9 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3ControlDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddS3ControlDependency.java
@@ -33,10 +33,12 @@
 import software.amazon.smithy.typescript.codegen.integration.RuntimeClientPlugin;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Add S3Control customization.
  */
+@SmithyInternalApi
 public class AddS3ControlDependency implements TypeScriptIntegration {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddStreamHasherDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddStreamHasherDependency.java
index 1fd710455199b..d2d3185396259 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddStreamHasherDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddStreamHasherDependency.java
@@ -27,10 +27,12 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Adds StreamHasher if needed.
  */
+@SmithyInternalApi
 public class AddStreamHasherDependency implements TypeScriptIntegration {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddTranscribeStreamingDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddTranscribeStreamingDependency.java
index 6ac1090698b76..d27dc7cfd6b3a 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddTranscribeStreamingDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddTranscribeStreamingDependency.java
@@ -30,11 +30,13 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Add client plugins and configs to support WebSocket streaming for Transcribe
  * Streaming service.
  **/
+@SmithyInternalApi
 public class AddTranscribeStreamingDependency implements TypeScriptIntegration {
     @Override
     public List<RuntimeClientPlugin> getClientPlugins() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddUserAgentDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddUserAgentDependency.java
index 9158c06914d86..292e0832b1579 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddUserAgentDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddUserAgentDependency.java
@@ -31,11 +31,13 @@
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.ListUtils;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Add client plubins and configs to support injecting user agent.
  */
 // TODO: Looks to add this back for non-AWS service clients, by fixing the dependency on ClientSharedValues.serviceId
+@SmithyInternalApi
 public class AddUserAgentDependency implements TypeScriptIntegration {
     @Override
     public List<RuntimeClientPlugin> getClientPlugins() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsDependency.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsDependency.java
index f20f38a349e93..aaa862ae17767 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsDependency.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsDependency.java
@@ -22,11 +22,13 @@
 import java.util.List;
 import software.amazon.smithy.codegen.core.SymbolDependency;
 import software.amazon.smithy.codegen.core.SymbolDependencyContainer;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * This enum should define all TypeScript dependencies that are introduced by
  * this package.
  */
+@SmithyInternalApi
 public enum AwsDependency implements SymbolDependencyContainer {
 
     MIDDLEWARE_SIGNING(NORMAL_DEPENDENCY, "@aws-sdk/middleware-signing", "^1.0.0-rc.1"),
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEc2.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEc2.java
index 383ed7163400c..4029a6fcc7d95 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEc2.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEc2.java
@@ -26,6 +26,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.HttpRpcProtocolGenerator;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.ec2 protocol for services. It handles reading and
@@ -43,6 +44,7 @@
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  * @see <a href="https://awslabs.github.io/smithy/spec/aws-core.html#ec2QueryName-trait">Smithy EC2 Query Name trait.</a>
  */
+@SmithyInternalApi
 final class AwsEc2 extends HttpRpcProtocolGenerator {
 
     AwsEc2() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEndpointGeneratorIntegration.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEndpointGeneratorIntegration.java
index 64c26c3a6f1e6..46a8713ae15c2 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEndpointGeneratorIntegration.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsEndpointGeneratorIntegration.java
@@ -29,10 +29,12 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Generates an endpoint resolver from endpoints.json.
  */
+@SmithyInternalApi
 public final class AwsEndpointGeneratorIntegration implements TypeScriptIntegration {
     @Override
     public void writeAdditionalFiles(
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_0.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_0.java
index 68d83904227ed..f58432ea80d2d 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_0.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_0.java
@@ -17,6 +17,7 @@
 
 import software.amazon.smithy.aws.traits.protocols.AwsJson1_0Trait;
 import software.amazon.smithy.model.shapes.ShapeId;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.json-1.0 protocol for services.
@@ -25,6 +26,7 @@
  *
  * @see JsonRpcProtocolGenerator
  */
+@SmithyInternalApi
 final class AwsJsonRpc1_0 extends JsonRpcProtocolGenerator {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_1.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_1.java
index 4b49567d4517a..538caab3b5497 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_1.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsJsonRpc1_1.java
@@ -17,6 +17,7 @@
 
 import software.amazon.smithy.aws.traits.protocols.AwsJson1_1Trait;
 import software.amazon.smithy.model.shapes.ShapeId;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.json-1.1 protocol for services.
@@ -25,6 +26,7 @@
  *
  * @see JsonRpcProtocolGenerator
  */
+@SmithyInternalApi
 final class AwsJsonRpc1_1 extends JsonRpcProtocolGenerator {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsPackageFixturesGeneratorIntegration.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsPackageFixturesGeneratorIntegration.java
index 167f0a3e23e7a..dcb13155871e1 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsPackageFixturesGeneratorIntegration.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsPackageFixturesGeneratorIntegration.java
@@ -34,8 +34,10 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
+@SmithyInternalApi
 public final class AwsPackageFixturesGeneratorIntegration implements TypeScriptIntegration {
     @Override
     public void writeAdditionalFiles(
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java
index def50877aaf93..c75dd01c90621 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java
@@ -37,10 +37,12 @@
 import software.amazon.smithy.typescript.codegen.integration.HttpProtocolGeneratorUtils;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Utility methods for generating AWS protocols.
  */
+@SmithyInternalApi
 final class AwsProtocolUtils {
 
     private AwsProtocolUtils() {}
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsQuery.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsQuery.java
index 952cc827c8d27..8d903d83ac31d 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsQuery.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsQuery.java
@@ -26,6 +26,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.HttpRpcProtocolGenerator;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.query protocol for services. It handles reading and
@@ -42,6 +43,7 @@
  * @see AwsProtocolUtils
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class AwsQuery extends HttpRpcProtocolGenerator {
 
     AwsQuery() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestJson1.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestJson1.java
index d37804f0e43f3..ad72b5d5c5591 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestJson1.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestJson1.java
@@ -17,6 +17,7 @@
 
 import software.amazon.smithy.aws.traits.protocols.RestJson1Trait;
 import software.amazon.smithy.model.shapes.ShapeId;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.rest-json-1 protocol for services.
@@ -25,6 +26,7 @@
  *
  * @see RestJsonProtocolGenerator
  */
+@SmithyInternalApi
 public final class AwsRestJson1 extends RestJsonProtocolGenerator {
 
     @Override
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestXml.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestXml.java
index c3704405ed75e..9807e18609542 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestXml.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestXml.java
@@ -33,6 +33,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.HttpBindingProtocolGenerator;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles generating the aws.rest-xml protocol for services. It handles reading and
@@ -55,6 +56,7 @@
  * @see <a href="https://awslabs.github.io/smithy/spec/http.html">Smithy HTTP protocol bindings.</a>
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class AwsRestXml extends HttpBindingProtocolGenerator {
 
     AwsRestXml() {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsServiceIdIntegration.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsServiceIdIntegration.java
index 045391406265e..358544b756eaa 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsServiceIdIntegration.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsServiceIdIntegration.java
@@ -24,12 +24,14 @@
 import software.amazon.smithy.model.Model;
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
  * Uses the {@code aws.api#service$sdkId} trait property to determine the
  * name of a service.
  */
+@SmithyInternalApi
 public final class AwsServiceIdIntegration implements TypeScriptIntegration {
 
     private static final Logger LOGGER = Logger.getLogger(AwsServiceIdIntegration.class.getName());
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsTraitsUtils.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsTraitsUtils.java
index 465037596e0e0..4d942245e1645 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsTraitsUtils.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsTraitsUtils.java
@@ -20,10 +20,12 @@
 import software.amazon.smithy.model.Model;
 import software.amazon.smithy.model.shapes.ServiceShape;
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Utility methods related to AWS traits.
  */
+@SmithyInternalApi
 final class AwsTraitsUtils {
 
     private AwsTraitsUtils() {}
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientCommandGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientCommandGenerator.java
index 27d52cd0275c5..6c104b96ba84c 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientCommandGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientCommandGenerator.java
@@ -35,7 +35,9 @@
 import software.amazon.smithy.typescript.codegen.ApplicationProtocol;
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
+@SmithyInternalApi
 final class DocumentClientCommandGenerator implements Runnable {
     static final String COMMAND_PROPERTIES_SECTION = "command_properties";
     static final String COMMAND_BODY_EXTRA_SECTION = "command_body_extra";
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientGenerator.java
index 5db6aba7f96e2..ee2656742a27b 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientGenerator.java
@@ -29,7 +29,9 @@
 import software.amazon.smithy.typescript.codegen.ApplicationProtocol;
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
+@SmithyInternalApi
 final class DocumentClientGenerator implements Runnable {
     static final String CLIENT_CONFIG_SECTION = "client_config";
     static final String CLIENT_PROPERTIES_SECTION = "client_properties";
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientUtils.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientUtils.java
index d506f630c780b..941a00761b42f 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientUtils.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentClientUtils.java
@@ -29,7 +29,9 @@
 import software.amazon.smithy.model.shapes.Shape;
 import software.amazon.smithy.model.shapes.StructureShape;
 import software.amazon.smithy.model.shapes.UnionShape;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
+@SmithyInternalApi
 final class DocumentClientUtils {
     static final String CLIENT_NAME = "DynamoDBDocumentClient";
     static final String CLIENT_FULL_NAME = "DynamoDBDocument";
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentFullClientGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentFullClientGenerator.java
index 04ee7faf26f36..09efe08e1fdd1 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentFullClientGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/DocumentFullClientGenerator.java
@@ -27,8 +27,10 @@
 import software.amazon.smithy.typescript.codegen.ApplicationProtocol;
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
+@SmithyInternalApi
 final class DocumentFullClientGenerator implements Runnable {
     static final String CLIENT_CONFIG_SECTION = "client_config";
     static final String CLIENT_PROPERTIES_SECTION = "client_properties";
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/Ec2ShapeSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/Ec2ShapeSerVisitor.java
index c22e35e704107..4635994e736de 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/Ec2ShapeSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/Ec2ShapeSerVisitor.java
@@ -24,6 +24,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.model.traits.XmlNameTrait;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
@@ -45,6 +46,7 @@
  * @see QueryShapeSerVisitor
  * @see <a href="https://awslabs.github.io/smithy/spec/aws-core.html#ec2QueryName-trait">Smithy EC2 Query Name trait.</a>
  */
+@SmithyInternalApi
 final class Ec2ShapeSerVisitor extends QueryShapeSerVisitor {
 
     Ec2ShapeSerVisitor(GenerationContext context) {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/EndpointGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/EndpointGenerator.java
index 7acb7e8fef5dc..9f8084aeaa106 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/EndpointGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/EndpointGenerator.java
@@ -32,12 +32,14 @@
 import software.amazon.smithy.utils.CaseUtils;
 import software.amazon.smithy.utils.IoUtils;
 import software.amazon.smithy.utils.OptionalUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
  * Writes out a file that resolves endpoints using endpoints.json, but the
  * created resolver resolves endpoints for a single service.
  */
+@SmithyInternalApi
 final class EndpointGenerator implements Runnable {
 
     private static final int VERSION = 3;
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberDeserVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberDeserVisitor.java
index 1f940aa9053b3..8bed3fe18b98c 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberDeserVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberDeserVisitor.java
@@ -22,11 +22,13 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Overrides the default implementation of BigDecimal and BigInteger shape
  * deserialization to throw when encountered in AWS REST JSON based protocols.
  */
+@SmithyInternalApi
 final class JsonMemberDeserVisitor extends DocumentMemberDeserVisitor {
 
     /**
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberSerVisitor.java
index 19d8ace675179..5d79072193677 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonMemberSerVisitor.java
@@ -22,6 +22,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Overrides the default implementation of BigDecimal and BigInteger shape
@@ -29,6 +30,7 @@
  *
  * TODO: Work out support for BigDecimal and BigInteger, natively or through a library.
  */
+@SmithyInternalApi
 final class JsonMemberSerVisitor extends DocumentMemberSerVisitor {
 
     /**
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonRpcProtocolGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonRpcProtocolGenerator.java
index 15280caf69a67..6a776cf4ee51d 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonRpcProtocolGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonRpcProtocolGenerator.java
@@ -26,6 +26,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.HttpRpcProtocolGenerator;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles general components across the AWS JSON protocols that have do not have
@@ -41,6 +42,7 @@
  * @see JsonMemberDeserVisitor
  * @see AwsProtocolUtils
  */
+@SmithyInternalApi
 abstract class JsonRpcProtocolGenerator extends HttpRpcProtocolGenerator {
 
     /**
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeDeserVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeDeserVisitor.java
index fab814b5648fe..edc3ab4dd15c2 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeDeserVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeDeserVisitor.java
@@ -33,6 +33,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.DocumentShapeDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Visitor to generate deserialization functions for shapes in AWS JSON protocol
@@ -43,6 +44,7 @@
  *
  * Timestamps are deserialized from {@link Format}.EPOCH_SECONDS by default.
  */
+@SmithyInternalApi
 final class JsonShapeDeserVisitor extends DocumentShapeDeserVisitor {
 
     JsonShapeDeserVisitor(GenerationContext context) {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeSerVisitor.java
index 18414e15c1725..905c8edc32678 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/JsonShapeSerVisitor.java
@@ -36,6 +36,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.DocumentShapeSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Visitor to generate serialization functions for shapes in AWS JSON protocol
@@ -46,6 +47,7 @@
  *
  * Timestamps are serialized to {@link Format}.EPOCH_SECONDS by default.
  */
+@SmithyInternalApi
 final class JsonShapeSerVisitor extends DocumentShapeSerVisitor {
     private static final Format TIMESTAMP_FORMAT = Format.EPOCH_SECONDS;
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryMemberSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryMemberSerVisitor.java
index 1d4e04d05b15f..0b8d105fe8879 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryMemberSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryMemberSerVisitor.java
@@ -22,6 +22,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Overrides the default implementation of BigDecimal and BigInteger shape
@@ -29,6 +30,7 @@
  *
  * TODO: Work out support for BigDecimal and BigInteger, natively or through a library.
  */
+@SmithyInternalApi
 final class QueryMemberSerVisitor extends DocumentMemberSerVisitor {
 
     QueryMemberSerVisitor(GenerationContext context, String dataSource, Format defaultTimestampFormat) {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryShapeSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryShapeSerVisitor.java
index 4d1feb4408801..3a59b99bd192a 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryShapeSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/QueryShapeSerVisitor.java
@@ -34,6 +34,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.DocumentShapeSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Visitor to generate serialization functions for shapes in form-urlencoded
@@ -44,6 +45,7 @@
  *
  * Timestamps are serialized to {@link Format}.DATE_TIME by default.
  */
+@SmithyInternalApi
 class QueryShapeSerVisitor extends DocumentShapeSerVisitor {
     private static final Format TIMESTAMP_FORMAT = Format.DATE_TIME;
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/RestJsonProtocolGenerator.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/RestJsonProtocolGenerator.java
index 4418472dc7189..082c82d8a52a3 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/RestJsonProtocolGenerator.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/RestJsonProtocolGenerator.java
@@ -34,6 +34,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.HttpBindingProtocolGenerator;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Handles general components across the AWS JSON protocols that have HTTP bindings.
@@ -50,6 +51,7 @@
  * @see AwsProtocolUtils
  * @see <a href="https://awslabs.github.io/smithy/spec/http.html">Smithy HTTP protocol bindings.</a>
  */
+@SmithyInternalApi
 abstract class RestJsonProtocolGenerator extends HttpBindingProtocolGenerator {
     /**
      * Creates a AWS JSON RPC protocol generator.
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/StripNewEnumNames.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/StripNewEnumNames.java
index b19b64d7416d7..24731555356dc 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/StripNewEnumNames.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/StripNewEnumNames.java
@@ -32,6 +32,7 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
 import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
 import software.amazon.smithy.utils.IoUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Strips enum names from enums that GA'd without them.
@@ -41,6 +42,7 @@
  * preserve backwards-compatibility by stripping names from enums that were known to have
  * launched without them.
  */
+@SmithyInternalApi
 public final class StripNewEnumNames implements TypeScriptIntegration {
     private final Set<ShapeId> enumsToStrip;
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberDeserVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberDeserVisitor.java
index 8c6c92cee1753..fb51cc3e49592 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberDeserVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberDeserVisitor.java
@@ -29,6 +29,7 @@
 import software.amazon.smithy.model.traits.TimestampFormatTrait.Format;
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Overrides several of the default implementations to handle XML document
@@ -43,6 +44,7 @@
  *
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class XmlMemberDeserVisitor extends DocumentMemberDeserVisitor {
 
     XmlMemberDeserVisitor(GenerationContext context, String dataSource, Format defaultTimestampFormat) {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberSerVisitor.java
index b80fdf4366182..d3091b6780c6a 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlMemberSerVisitor.java
@@ -34,6 +34,7 @@
 import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Overrides several of the default implementations to handle XML document
@@ -48,6 +49,7 @@
  *
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class XmlMemberSerVisitor extends DocumentMemberSerVisitor {
     private final GenerationContext context;
 
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeDeserVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeDeserVisitor.java
index 53776630bdae6..0fbfd4923ff6a 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeDeserVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeDeserVisitor.java
@@ -37,6 +37,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.DocumentShapeDeserVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Visitor to generate deserialization functions for shapes in XML-document
@@ -49,6 +50,7 @@
  *
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class XmlShapeDeserVisitor extends DocumentShapeDeserVisitor {
 
     XmlShapeDeserVisitor(GenerationContext context) {
diff --git a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeSerVisitor.java b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeSerVisitor.java
index 6ded4d6f5ff1a..f3ef540bfe4c5 100644
--- a/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeSerVisitor.java
+++ b/codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/XmlShapeSerVisitor.java
@@ -37,6 +37,7 @@
 import software.amazon.smithy.typescript.codegen.integration.DocumentMemberSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.DocumentShapeSerVisitor;
 import software.amazon.smithy.typescript.codegen.integration.ProtocolGenerator.GenerationContext;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Visitor to generate serialization functions for shapes in XML-document
@@ -49,6 +50,7 @@
  *
  * @see <a href="https://awslabs.github.io/smithy/spec/xml.html">Smithy XML traits.</a>
  */
+@SmithyInternalApi
 final class XmlShapeSerVisitor extends DocumentShapeSerVisitor {
     private static final Format TIMESTAMP_FORMAT = Format.DATE_TIME;