HTTP Status Codes

The server has received the request headers and the client should proceed

The requester has asked the server to switch protocols

The server has received and is processing the request

Standard response for successful HTTP requests

The request has been fulfilled and resulted in a new resource being created

The request has been accepted for processing, but processing is not complete

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

This and all future requests should be directed to the given URI

Temporary redirect - the resource resides temporarily under a different URI

Resource has not been modified since the version specified by request headers

The request should be repeated with another URI, but future requests should still use the original URI

The request and all future requests should be repeated using another URI

The server cannot or will not process the request due to client error

Authentication is required and has failed or has not been provided

The request was valid, but the server is refusing to respond to it

The requested resource could not be found

Request method not supported for the requested resource

The server timed out waiting for the request

Request could not be processed because of conflict in the current state

The user has sent too many requests in a given amount of time

A generic error message when the server encounters an unexpected condition

The server does not support the functionality required to fulfill the request

The server received an invalid response from an upstream server

The server is currently unavailable (overloaded or down for maintenance)

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