HTTP status codes

The following is a list of HTTP response status codes and their short textual descriptions. These status codes are specified by RFC 2616.

The first digit of the status code specifies one of five classes of response.

HTTP status code classes:


1xx: Informational

This status codes are used to inform the client that the initial part of the request has been received and has not yet been rejected by the server.

100 Continue

The client should continue with its request. This interim response is used to inform the client that the initial part of the request has been received and has not yet been rejected by the server.

101 Switching Protocols

The server understands and is willing to comply with the client's request, via the Upgrade message header field, for a change in the application protocol being used on this connection. The server will switch protocols to those defined by the response's Upgrade header field immediately after the empty line which terminates the 101 response.

103 Early Hints

This status code is primarily intended to be used with the Link header, letting the user agent start preloading resources while the server prepares a response.

2xx Successful

The request has succeeded. The information returned with the response is dependent on the method used in the request.

200 OK

The request has succeeded. The information returned with the response is dependent on the method used in the request.

201 Created

The request has been fulfilled and resulted in a new resource being created. The newly created resource can be referenced by the URI(s) returned in the entity of the response, with the most specific URI for the resource given by a Location header field.

202 Accepted

The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon, as it might be disallowed when processing actually takes place.

203 Non-Authoritative Information

The returned metainformation in the entity-header is not the definitive set as available from the origin server, but is gathered from a local or a third-party copy.

204 No Content

The server has fulfilled the request but does not need to return an entity-body, and might want to return updated metainformation.

205 Reset Content

The server has fulfilled the request and the user agent should reset the document view which caused the request to be sent.

206 Partial Content

The server has fulfilled the partial GET request for the resource.

3xx: Redirection

This class of status code indicates that further action needs to be taken by the user agent in order to fulfill the request.

300 Multiple Choices

The requested resource corresponds to any one of a set of representations, each with its own specific location, and agent-driven negotiation information is being provided so that the user (or user agent) can select a preferred representation and redirect its request to that location.

301 Moved Permanently

The requested resource has been assigned a new permanent URI and any future references to this resource should use one of the returned URIs. Clients with link editing capabilities ought to automatically re-link references to the Request-URI to one or more of the new references returned by the server, where possible.

302 Found

The requested resource resides temporarily under a different URI. Since the redirection might be altered on occasion, the client should continue to use the Request-URI for future requests.

303 See Other

The response to the request can be found under a different URI and should be retrieved using a GET method on that resource.

304 Not Modified

If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server should respond with this status code.

305 Use Proxy

The requested resource must be accessed through the proxy given by the Location field. The Location field gives the URI of the proxy. The recipient is expected to repeat this single request via the proxy.

307 Temporary Redirect

The requested resource resides temporarily under a different URI. Since the redirection may be altered on occasion, the client SHOULD continue to use the Request-URI for future requests.

308 Permanent Redirect

The 308 (Permanent Redirect) status code indicates that the target resource has been assigned a new permanent URI and any future references to this resource ought to use one of the enclosed URIs. Clients with link editing capabilities ought to automatically re-link references to the effective request URI to one or more of the new references sent by the server, where possible.

This status code is similar to 301 (Moved Permanently), except that it does not allow changing the request method from POST to GET.

4xx: Client Error

The 4xx class of status code is intended for cases in which the client seems to have erred. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition.

400 Bad Request

The request could not be understood by the server due to malformed syntax. The client shoould not repeat the request without modifications.

401 Unauthorized

The request requires user authentication. The response must include a WWW-Authenticate header field containing a challenge applicable to the requested resource.

402 Payment Required

This code is reserved for future use.

403 Forbidden

The server understood the request, but is refusing to fulfill it. Authorization will not help and the request should not be repeated.

404 Not Found

The server has not found anything matching the Request-URI.

405 Method Not Allowed

The method specified in the Request-Line is not allowed for the resource identified by the Request-URI.

406 Not Acceptable

The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request.

407 Proxy Authentication Required

This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy.

408 Request Timeout

The client did not produce a request within the time that the server was prepared to wait.

409 Conflict

The request could not be completed due to a conflict with the current state of the resource. This code is only allowed in situations where it is expected that the user might be able to resolve the conflict and resubmit the request.

410 Gone

The requested resource is no longer available at the server and no forwarding address is known. This condition is expected to be considered permanent. Clients with link editing capabilities should delete references to the Request-URI after user approval.

411 Length Required

The server refuses to accept the request without a defined Content-Length.

412 Precondition Failed

The precondition given in one or more of the request-header fields evaluated to false when it was tested on the server.

413 Request Entity Too Large

The server is refusing to process a request because the request entity is larger than the server is willing or able to process.

414 Request-URI Too Long

The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.

415 Unsupported Media Type

The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.

416 Requested Range Not Satisfiable

A server should return a response with this status code if a request included a Range request-header field, and none of the range-specifier values in this field overlap the current extent of the selected resource, and the request did not include an If-Range request-header field.

417 Expectation Failed

The expectation given in an Expect request-header field could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could not be met by the next-hop server.

451 Unavailable For Legal Reasons

Indicates that the user requested a resource that is not available due to legal reasons, such as a web page for which a legal action has been issued.

5xx: Server Error

Response status codes beginning with the digit "5" indicate cases in which the server is aware that it has erred or is incapable of performing the request. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. User agents should display any included entity to the user. These response codes are applicable to any request method.

500 Internal Server Error

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

501 Not Implemented

The server does not support the functionality required to fulfill the request. This is the appropriate response when the server does not recognize the request method and is not capable of supporting it for any resource.

502 Bad Gateway

The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request.

503 Service Unavailable

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

504 Gateway Timeout

The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server specified by the URI (e.g. HTTP, FTP, LDAP) or some other auxiliary server (e.g. DNS) it needed to access in attempting to complete the request.

505 HTTP Version Not Supported

The server does not support, or refuses to support, the HTTP protocol version that was used in the request message.