Common codes only. Reference lookup; no live URL check.
100 Continue
The client may continue sending the request.
1xx — Informational101 Switching Protocols
The server agrees to switch protocols.
1xx — Informational103 Early Hints
Preliminary headers may help preload resources.
1xx — Informational200 OK
The request succeeded.
2xx — Success201 Created
The request created one or more resources.
2xx — Success202 Accepted
Accepted for processing; completion is not guaranteed.
2xx — Success204 No Content
Successful response with no response body.
2xx — Success206 Partial Content
A requested range of the resource is returned.
2xx — Success301 Moved Permanently
Permanent redirection; some clients change POST to GET.
3xx — Redirection302 Found
Temporary redirection; some clients change POST to GET.
3xx — Redirection303 See Other
Retrieve another resource with GET or HEAD.
3xx — Redirection304 Not Modified
The cached representation can be reused after a conditional request.
3xx — Redirection307 Temporary Redirect
Temporary redirection preserving the request method.
3xx — Redirection308 Permanent Redirect
Permanent redirection preserving the request method.
3xx — Redirection400 Bad Request
The server cannot process the request due to a client error.
4xx — Client error401 Unauthorized
Valid authentication credentials are required.
4xx — Client error403 Forbidden
The server understands the request but refuses it.
4xx — Client error404 Not Found
No current representation was found, or its existence is not disclosed.
4xx — Client error405 Method Not Allowed
The resource does not support this request method.
4xx — Client error408 Request Timeout
The server did not receive a complete request in time.
4xx — Client error409 Conflict
The request conflicts with the resource’s current state.
4xx — Client error410 Gone
The resource is no longer available, likely permanently.
4xx — Client error413 Content Too Large
The request content exceeds the server’s accepted size.
4xx — Client error415 Unsupported Media Type
The request content format is not supported.
4xx — Client error422 Unprocessable Content
Syntax and type are understood, but instructions cannot be processed.
4xx — Client error429 Too Many Requests
The client has sent too many requests in a given time.
4xx — Client error500 Internal Server Error
An unexpected server condition prevented completion.
5xx — Server error501 Not Implemented
The server does not support the required functionality.
5xx — Server error502 Bad Gateway
A gateway received an invalid upstream response.
5xx — Server error503 Service Unavailable
The server is temporarily unavailable, often overloaded or under maintenance.
5xx — Server error504 Gateway Timeout
A gateway did not receive an upstream response in time.
5xx — Server error511 Network Authentication Required
Authentication is needed to gain network access.
5xx — Server error
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