2xx – OK/SUCCESS
200 OK – Standard response for successful HTTP requests
201 Created – Request has been fulfilled; new resource created
202 Accepted – Request accepted, processing pending
203 Non-Authoritative Information – Request processed, information may be from another source
204 No Content – Request processed, no content returned
205 Reset Content – Request processed, no content returned, reset the document view
206 Partial Content – Partial resource return due to the request header
207 Multi-Status – XML can contain multiple separate responses
208 Already Reported – Results previously returned
226 IM Used – Request fulfilled, the response is instance-manipulations
201 Created – Request has been fulfilled; new resource created
202 Accepted – Request accepted, processing pending
203 Non-Authoritative Information – Request processed, information may be from another source
204 No Content – Request processed, no content returned
205 Reset Content – Request processed, no content returned, reset the document view
206 Partial Content – Partial resource return due to the request header
207 Multi-Status – XML can contain multiple separate responses
208 Already Reported – Results previously returned
226 IM Used – Request fulfilled, the response is instance-manipulations
3xx – REDIRECTION
300 Multiple Choices – Multiple options for the resource delivered
301 Moved Permanently – This and all future requests directed to the given URI
302 Found – Temporary response to request found via alternative URI
303 See Other – Permanent response to request found via alternative URI
304 Not Modified – Resource has not been modified since last requested
305 Use Proxy – Content located elsewhere, retrieve from there
306 Reserved – Subsequent requests should use the specified proxy
307 Temporary Redirect – Connect again to different URI as provided
308 Permanent Redirect – Resumable HTTP requests
301 Moved Permanently – This and all future requests directed to the given URI
302 Found – Temporary response to request found via alternative URI
303 See Other – Permanent response to request found via alternative URI
304 Not Modified – Resource has not been modified since last requested
305 Use Proxy – Content located elsewhere, retrieve from there
306 Reserved – Subsequent requests should use the specified proxy
307 Temporary Redirect – Connect again to different URI as provided
308 Permanent Redirect – Resumable HTTP requests
4xx – CLIENT ERROR
400 Bad Request – Request cannot be fulfilled due to bad syntax
401 Unauthorized – Authentication is possible but has failed
402 Payment Required – Payment required, reserved for future use
403 Forbidden – Server refuses to respond to the request
404 Not Found – Requested resource could not be found
405 Method Not Allowed – Request method not supported by that resource
406 Not Acceptable – Content not acceptable according to the Accept headers
407 Proxy Authentication Required – Client must first authenticate itself with the proxy
408 Request Timeout – Server timed out waiting for the request
409 Conflict – Request could not be processed because of conflict
410 Gone – Resource is no longer available and will not be available again
411 Length Required – Request did not specify the length of its content
412 Precondition Failed – Server does not meet request preconditions
413 Request Entity Too Large – Request is larger than the server is willing or able to process
414 Request-URI Too Long – URI provided was too long for the server to process
415 Unsupported Media Type – Server does not support the media type
416 Requested Range Not Satisfiable – The client has asked for unprovable portion of the file
417 Expectation Failed – Server cannot meet requirements of Expect request-header field
422 Unprocessable Entity – Request unable to be followed due to semantic errors
423 Locked – Resource that is being accessed is locked
424 Failed Dependency – Resource that is being accessed is locked
426 Upgrade Required – Client should switch to a different protocol
428 Precondition Required – Origin server requires the request to be conditional
429 Too Many Requests – User has sent too many requests in a given amount of time
431 Request Header Fields Too Large – Server is unwilling to process the request
401 Unauthorized – Authentication is possible but has failed
402 Payment Required – Payment required, reserved for future use
403 Forbidden – Server refuses to respond to the request
404 Not Found – Requested resource could not be found
405 Method Not Allowed – Request method not supported by that resource
406 Not Acceptable – Content not acceptable according to the Accept headers
407 Proxy Authentication Required – Client must first authenticate itself with the proxy
408 Request Timeout – Server timed out waiting for the request
409 Conflict – Request could not be processed because of conflict
410 Gone – Resource is no longer available and will not be available again
411 Length Required – Request did not specify the length of its content
412 Precondition Failed – Server does not meet request preconditions
413 Request Entity Too Large – Request is larger than the server is willing or able to process
414 Request-URI Too Long – URI provided was too long for the server to process
415 Unsupported Media Type – Server does not support the media type
416 Requested Range Not Satisfiable – The client has asked for unprovable portion of the file
417 Expectation Failed – Server cannot meet requirements of Expect request-header field
422 Unprocessable Entity – Request unable to be followed due to semantic errors
423 Locked – Resource that is being accessed is locked
424 Failed Dependency – Resource that is being accessed is locked
426 Upgrade Required – Client should switch to a different protocol
428 Precondition Required – Origin server requires the request to be conditional
429 Too Many Requests – User has sent too many requests in a given amount of time
431 Request Header Fields Too Large – Server is unwilling to process the request
5xx – SERVER ERROR
500 Internal Server Error – Generic error message
501 Not Implemented – Server does not recognize the method or lacks the ability to fulfill
502 Bad Gateway – Server received an invalid response from the upstream server
503 Service Unavailable – Server is currently unavailable
504 Gateway Timeout – Gateway did not receive a response from the upstream server
505 HTTP Version Not Supported – Server does not support the HTTP protocol version
506 Variant Also Negotiates (Experimental) – Content negotiation for the request results in a circular reference
507 Insufficient Storage – Server is unable to store the representation
508 Loop Detected – Server detected an infinite loop while processing the request
509 Unassigned – Bandwidth limit exceeded
510 Not Extended – Further extensions to the request are required
511 Network Authentication Required – Client needs to authenticate to gain network access
501 Not Implemented – Server does not recognize the method or lacks the ability to fulfill
502 Bad Gateway – Server received an invalid response from the upstream server
503 Service Unavailable – Server is currently unavailable
504 Gateway Timeout – Gateway did not receive a response from the upstream server
505 HTTP Version Not Supported – Server does not support the HTTP protocol version
506 Variant Also Negotiates (Experimental) – Content negotiation for the request results in a circular reference
507 Insufficient Storage – Server is unable to store the representation
508 Loop Detected – Server detected an infinite loop while processing the request
509 Unassigned – Bandwidth limit exceeded
510 Not Extended – Further extensions to the request are required
511 Network Authentication Required – Client needs to authenticate to gain network access