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HTTP Status Codes

Searchable reference of HTTP response codes.

1xx Informational

100	Continue	Client should continue with its request.
101	Switching Protocols	Server is switching protocols (e.g. WebSocket upgrade).
102	Processing	Server has received the request and is processing.
103	Early Hints	Preliminary headers before the final response.

2xx Success

200	OK	The request succeeded.
201	Created	Resource created; Location header has its URL.
202	Accepted	Request accepted but not yet processed.
203	Non-Authoritative Information	Response from a cache or proxy, not the origin.
204	No Content	Success with no response body.
205	Reset Content	Client should reset the document view.
206	Partial Content	Partial response to a Range request.

3xx Redirection

300	Multiple Choices	Several options for the requested resource.
301	Moved Permanently	Resource permanently moved to a new URL.
302	Found	Temporary redirect; keep using the original URL.
303	See Other	Fetch the resource with GET at another URL.
304	Not Modified	Cached version is still valid.
307	Temporary Redirect	Temporary redirect preserving the method.
308	Permanent Redirect	Permanent redirect preserving the method.

4xx Client Error

400	Bad Request	Malformed request the server cannot process.
401	Unauthorized	Authentication required or failed.
402	Payment Required	Reserved for future use.
403	Forbidden	Authenticated but not allowed to access.
404	Not Found	Resource does not exist.
405	Method Not Allowed	HTTP method not supported for this resource.
406	Not Acceptable	No content matching the Accept headers.
407	Proxy Authentication Required	Authenticate with the proxy first.
408	Request Timeout	Client took too long to send the request.
409	Conflict	Request conflicts with current resource state.
410	Gone	Resource permanently removed.
411	Length Required	Content-Length header is required.
412	Precondition Failed	If-Match / If-Unmodified-Since failed.
413	Payload Too Large	Request body exceeds server limits.
414	URI Too Long	Requested URL is too long.
415	Unsupported Media Type	Content type not supported.
416	Range Not Satisfiable	Requested range outside the resource size.
417	Expectation Failed	Expect header requirement cannot be met.
418	I'm a Teapot	RFC 2324 — short and stout.
422	Unprocessable Entity	Syntactically valid but semantically wrong.
425	Too Early	Server unwilling to process a replayed request.
426	Upgrade Required	Client must switch to another protocol.
428	Precondition Required	Request must be conditional.
429	Too Many Requests	Rate limit exceeded.
431	Request Header Fields Too Large	Headers exceed the server limit.
451	Unavailable For Legal Reasons	Blocked for legal reasons.

5xx Server Error

500	Internal Server Error	Unexpected server-side error.
501	Not Implemented	Server does not support the functionality.
502	Bad Gateway	Upstream server returned an invalid response.
503	Service Unavailable	Server overloaded or down for maintenance.
504	Gateway Timeout	Upstream server did not respond in time.
505	HTTP Version Not Supported	Protocol version unsupported.
507	Insufficient Storage	Server out of storage to complete the request.
508	Loop Detected	Infinite loop while processing the request.
511	Network Authentication Required	Network login required (captive portal).