Front desk · HTTP Status Codes
5×× Server Error
504 Gateway Timeout
· filed 2026-07-18 · click a code to copy
HTTP 504 Gateway Timeout is a server error-class status code defined in RFC9110. A gateway or proxy did not receive a timely response from the upstream server.
Server-error responses admit the fault is on the server's side: the request was valid, but the server failed to fulfil it. On the wire, the response begins with the status line HTTP/1.1 504 Gateway Timeout.