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HTTP Status Code Reference

Look up any HTTP status code and understand its meaning, category, and usage.

100ContinueInformational

The server received the request headers and the client should proceed to send the request body.

101Switching ProtocolsInformational

The server is switching protocols as requested by the client (e.g., WebSocket upgrade).

200OKSuccess

The request succeeded. The response payload depends on the HTTP method used.

201CreatedSuccess

The request succeeded and a new resource was created as a result.

204No ContentSuccess

The server successfully processed the request but is not returning any content.

301Moved PermanentlyRedirection

The resource has been permanently moved to a new URL. Search engines will update their index.

302FoundRedirection

The resource temporarily resides at a different URL. The client should continue to use the original URL.

304Not ModifiedRedirection

The cached version of the resource is still valid. No need to re-transfer.

307Temporary RedirectRedirection

The resource temporarily resides at a different URL. The request method must not change.

308Permanent RedirectRedirection

The resource has been permanently moved. The request method must not change.

400Bad RequestClient Error

The server cannot process the request due to malformed syntax or invalid request framing.

401UnauthorizedClient Error

Authentication is required and has failed or has not been provided.

403ForbiddenClient Error

The server understood the request but refuses to authorize it.

404Not FoundClient Error

The server cannot find the requested resource. The URL is not recognized.

405Method Not AllowedClient Error

The HTTP method used is not supported for the requested resource.

408Request TimeoutClient Error

The server timed out waiting for the request from the client.

429Too Many RequestsClient Error

The user has sent too many requests in a given amount of time (rate limiting).

500Internal Server ErrorServer Error

The server encountered an unexpected condition that prevented it from fulfilling the request.

502Bad GatewayServer Error

The server received an invalid response from an upstream server while acting as a gateway.

503Service UnavailableServer Error

The server is currently unable to handle the request due to maintenance or overloading.

504Gateway TimeoutServer Error

The server did not receive a timely response from an upstream server.