SAM Doctor

ERROR REFERENCE

The endpoint does not implement the requested API action

The endpoint returned NotImplemented for the operation. Check the service API, endpoint, client version, and Region before changing permissions.

WHAT IT MEANS

The selected endpoint cannot serve this request

An error occurred (NotImplemented) when calling the ListSchedules operation: operation is not implemented

This response can come from a custom endpoint, proxy, stale client, or local emulator that does not support the operation or request shape. It is not evidence of an IAM denial, and it does not prove that the operation is unavailable in every AWS Region or service version.

NEXT CHECK

Verify the operation and endpoint together

  1. Read the exact operation and status. Preserve the operation, service, endpoint, Region, and HTTP status from the same log line.
  2. Compare with the current API reference. Confirm the operation exists for the selected service and update the SDK or CLI if the client is older than the API you are calling.
  3. Check custom endpoints and emulators. If a proxy or local emulator handled the request, verify that it implements the operation or retry against the intended AWS endpoint.

AUTOMATE THE TRIAGE

Keep the check in your normal workflow

SAM Doctor recognizes an AWS NotImplemented operation marker with low confidence and keeps the advice investigative. Runs locally; no AWS access, no log upload. 

python -m pip install sam-doctor
sam-doctor diagnose deployment.log --format markdown

RELATED