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HTTP Status Codes

HTTP 203 Non-Authoritative Information

203 Non-Authoritative Information

The server successfully returned a response, but the metadata may have been modified by a transforming proxy.

203 Non-Authoritative Informationgeneral

Observed message

203 Non-Authoritative Information

Why it happens

  • The request completed successfully according to the semantics of this status code.
  • The server selected a more specific success response based on the method, resource state, or negotiation result.
  • An API, framework, or intermediary intentionally returned this success code to describe a more precise outcome.

How to fix it

  1. Confirm that the status code matches the behavior your client or integration expects.
  2. Review related headers such as Location, Content-Range, ETag, or DAV metadata where relevant.
  3. If the success code is unexpected, inspect application logic, API contract, and intermediary behavior.

Official reference

IANA: HTTP Status Code Registry

Related errors

100 ContinueHTTP 100 Continue101 Switching ProtocolsHTTP 101 Switching Protocols102 ProcessingHTTP 102 Processing103 Early HintsHTTP 103 Early Hints

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203 Non-Authoritative Information: what it means and how to fix it | Error Atlas