HTTP Status Codes

100 ContinueThe server has received the request headers and the client should proceed to send the body. 101 Switching ProtocolsThe server agrees to switch to the protocol requested by the client in the Upgrade header. 102 ProcessingThe server has accepted the request but has not finished processing it (WebDAV). 103 Early HintsLets the server send preliminary headers (such as Link preload) before the final response.

200 OKThe request succeeded and the response contains the requested data. 201 CreatedThe request succeeded and a new resource was created. 202 AcceptedThe request was accepted for processing but is not complete yet. 203 Non-Authoritative InformationThe response was modified by a transforming proxy and may differ from the origin. 204 No ContentThe request succeeded and there is no body to return. 205 Reset ContentTells the client to reset the document view, such as clearing a form. 206 Partial ContentThe server is delivering only part of the resource because of a Range header. 207 Multi-StatusConveys multiple status codes for a batch operation (WebDAV).

301 Moved PermanentlyThe resource has a new permanent URL and clients should use it from now on. 302 FoundThe resource is temporarily at a different URL. 303 See OtherThe response to the request can be found at another URL using GET. 304 Not ModifiedThe cached copy of the resource is still valid so no body is sent. 307 Temporary RedirectThe resource is temporarily at another URL and the method and body must not change. 308 Permanent RedirectThe resource has moved permanently and the method and body must not change.

400 Bad RequestThe server cannot process the request because it is malformed or invalid. 401 UnauthorizedAuthentication is required or the supplied credentials are invalid. 402 Payment RequiredReserved for digital payment systems; used by some APIs when a plan limit is reached. 403 ForbiddenThe server understood the request but refuses to authorise it. 404 Not FoundThe server cannot find the requested resource. 405 Method Not AllowedThe HTTP method is not supported for this resource. 406 Not AcceptableThe server cannot produce a response matching the Accept headers sent. 408 Request TimeoutThe server timed out waiting for the request. 409 ConflictThe request conflicts with the current state of the resource. 410 GoneThe resource was intentionally removed and will not return. 411 Length RequiredThe server requires a Content-Length header. 412 Precondition FailedA precondition in the request headers evaluated to false. 413 Payload Too LargeThe request body is larger than the server allows. 414 URI Too LongThe request URL is longer than the server will process. 415 Unsupported Media TypeThe server does not support the request Content-Type. 418 I'm a teapotAn April Fools' joke status from RFC 2324 meaning the server refuses to brew coffee because it is a teapot. 422 Unprocessable ContentThe request is well-formed but contains semantic validation errors. 423 LockedThe resource is locked (WebDAV). 425 Too EarlyThe server is unwilling to risk processing a request that might be replayed. 426 Upgrade RequiredThe client must switch to a different protocol. 428 Precondition RequiredThe server requires the request to be conditional. 429 Too Many RequestsThe client has sent too many requests in a given time (rate limiting). 431 Request Header Fields Too LargeThe headers are too large for the server to process. 451 Unavailable For Legal ReasonsThe resource is blocked because of a legal demand.

500 Internal Server ErrorA generic error meaning the server hit an unexpected condition. 501 Not ImplementedThe server does not support the functionality needed to fulfil the request. 502 Bad GatewayA gateway or proxy received an invalid response from the upstream server. 503 Service UnavailableThe server is temporarily unable to handle the request. 504 Gateway TimeoutA gateway did not receive a timely response from the upstream server. 505 HTTP Version Not SupportedThe server does not support the HTTP version used in the request. 507 Insufficient StorageThe server cannot store the representation needed to complete the request (WebDAV). 508 Loop DetectedThe server detected an infinite loop while processing the request (WebDAV). 511 Network Authentication RequiredThe client needs to authenticate to gain network access.