Informational 1xx
This class of status code indicates a provisional response.
| Code | Text | Description |
|---|---|---|
| 100 | Continue | The client SHOULD continue with its request. |
| 101 | Switching Protocols | The server understands and is willing to comply with the client's request. |
Successful 2xx
This class of status code indicates that the client's request was successfully received, understood, and accepted.
| Code | Text | Description |
|---|---|---|
| 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. |
| 202 | Accepted | The request has been accepted for processing, but the processing has not been completed. |
| 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. |
Redirection 3xx
This class of status code indicates that further action needs to be taken by the user agent in order to fulfill the request.
| Code | Text | Description |
|---|---|---|
| 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 (section 12) 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. |
| 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. |
| 306 | Unused | The 306 status code was used in a previous version of the specification, is no longer used, and the code is reserved. |
| 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. |
Client Error 4xx
The 4xx class of status code is intended for cases in which the client seems to have erred.
| Code | Text | Description |
|---|---|---|
| 400 | Bad Request | The request could not be understood by the server due to malformed syntax. |
| 401 | Unauthorized | Unauthorized |
| 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. No indication is given of whether the condition is temporary or permanent. |
| 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. The client MAY repeat the request without modifications at any later time. |
| 409 | Conflict | The request could not be completed due to a conflict with the current state of the resource. |
| 410 | Gone | The requested resource is no longer available at the server and no forwarding address is known. |
| 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 |
| 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. |
| 422 | Unprocessable Entity | The request was well-formed but was unable to be followed due to semantic errors. |
Server Error 5xx
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.
| Code | Text | Description |
|---|---|---|
| 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. |
| 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. |
Data gathered from W3.org & Wikipedia. Any modification request is always welcome!