diff --git a/packages/@aws-cdk/aws-bedrock-agentcore-alpha/agentcore/runtime/types.ts b/packages/@aws-cdk/aws-bedrock-agentcore-alpha/agentcore/runtime/types.ts
index 8b9690c36e069..7f47074afd2f6 100644
--- a/packages/@aws-cdk/aws-bedrock-agentcore-alpha/agentcore/runtime/types.ts
+++ b/packages/@aws-cdk/aws-bedrock-agentcore-alpha/agentcore/runtime/types.ts
@@ -16,4 +16,9 @@ export enum ProtocolType {
    * HTTP protocol
    */
   HTTP = 'HTTP',
+
+  /**
+   * A2A protocol
+   */
+  A2A = 'A2A',
 }