Help with Bedrock Agentcore Gateway Target setup

Hey all,

TITLE: Is AWS Bedrock AgentCore Gateway officially compatible with Durable Execution Lambda handlers?

I’m trying to use an AWS Durable Lambda function (https://docs.aws.amazon.com/lambda/latest/dg/durable-functions.html, https://github.com/aws/aws-durable-execution-sdk-python) as a target for AWS Bedrock AgentCore Gateway, but the target registration fails.

Error during “Update Target”:

Update Target operation failed for client-actions:

There was an error creating the target(s). ValidationException: Invalid request to Lambda function arn:xxxxx

Invalid parameter or request content. Check your request parameters and retry

My observations:

A plain Lambda function works successfully as a Gateway target.

A different plain durable Lambda fails if attempted to add as a Gateway target.

The failure happens during Gateway target validation/update, before actual runtime invocation.

Minimal reproducible example:

from aws_durable_execution_sdk_python.config import Duration

from aws_durable_execution_sdk_python.context import DurableContext, StepContext, durable_step

from aws_durable_execution_sdk_python.execution import durable_execution

@durable_execution

def lambda_handler(event, context) -> dict:

return {

"statusCode": 200,

"body": {

"responses": [

{

"answer": "Working",

"lang": "EN-US",

"options": ["1"]

}

],

"response_mode": "single",

"type": "success"

},

"provider_type": "sample_provider",

"bypass_send_message": False

}

AWS Region: us-west-2

Runtime: Python 3.x

Using AWS Durable Execution SDK for Python

AgentCore Gateway target type: Lambda

I found the Git repo example suggesting durable Lambda handlers can work with AgentCore Gateway as target, but I could not find official AWS documentation confirming whether this integration is supported.

Source: https://github.com/kpx-dev/strands-agentcore-async-demo

Questions:

Are durable lambda handlers decorated with @durable_execution officially supported as AgentCore Gateway targets?

Does Gateway validation require a specific request/response contract for durable handlers?

Would appreciate any help or examples being pointed out.

Thanks much in advance!