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General

AWS received an unknown or invalid operation name

UnknownOperationException

AWS could not route the request because the requested action or operation name is invalid for the endpoint or API being called.

UnknownOperationExceptionconfiguration

Observed message

UnknownOperationException

Why it happens

  • The request specifies an invalid action or operation name.
  • The request is being sent to the wrong AWS service endpoint.
  • Custom signing or low-level request construction produced an invalid operation target.

How to fix it

  1. Verify the action or operation name exactly as documented for the target service.
  2. Check that the request is being sent to the correct AWS endpoint.
  3. Prefer the official SDK for request construction if you are assembling requests manually.

Official reference

AWS Management Console: Common Errors

Related errors

OptInRequiredAWS account is not subscribed to the serviceAccessDeniedExceptionAWS API request failed with AccessDeniedExceptionInvalidActionAWS API request used an invalid actionUnrecognizedClientExceptionAWS did not recognize the client credentials in the request

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AWS UnknownOperationException: causes and fixes | Error Atlas