General
AWS request is missing an authentication token
MissingAuthenticationToken
AWS rejected the request because an authentication token or signature expected by the API was missing.
Error AtlasError Documentation and ResolutionObserved message
MissingAuthenticationToken
Why it happens
- The request was sent without the required authentication information.
- Signing headers or tokens were omitted by the client or proxy.
- An endpoint expecting signed requests received an unsigned call.
How to fix it
- Confirm the request is being signed with the correct AWS credentials.
- Check that required auth headers or tokens are present when the request is sent.
- Verify the endpoint and auth flow match the service being called.
Official reference
AWS Support API Reference: Common ErrorsRelated errors
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