index.md

---

title: 203 Non-Authoritative Information
slug: Web/HTTP/Status/203
spec-urls: https://httpwg.org/specs/rfc9110.html#status.203

---

{{HTTPSidebar}}

The HTTP 203 Non-Authoritative Information response status indicates that the request was successful but the enclosed payload has been modified by a transforming {{Glossary("Proxy server", "proxy")}} from that of the origin server's {{HTTPStatus("200")}} (OK) response.

The 203 response is similar to the value 214, meaning Transformation Applied, of the {{HTTPHeader("Warning")}} header code, which has the additional advantage of being applicable to responses with any status code.

Status

203 Non-Authoritative Information

Specifications

{{Specifications}}

See also

• {{HTTPStatus("200")}}

• {{Glossary("Proxy server")}}

• {{HTTPHeader("Warning")}}