Http Status Codes

Subset of available HTTP Status Codes

Status code	API meaning
200	All is good; response will include applicable resource information, as well
201	Resource created; will include the Location header specifying a URI to the newly created resource
202	Same as 200, but used for async; in other words, all is good, but we need to poll the service to find out when completed
301	The resource was moved; should include URI to new location
400	Bad request; caller should reformat the request
401	Unauthorized; should respond with an authentication challenge, to let the caller resubmit with appropriate credentials
402	Reserved for future use, but many times used to indicate a failure in a business rule or validation check
403	Access denied; user successfully authenticated, but is not allowed to access the requested resource
404	Resource not found, or caller not allowed to access the resource, and we don't want to reveal the reason
409	Conflict; used as a response to a PUT request when another caller has dirtied the resource
500	Server error; something bad happened, and server might include some indication of the underlying problem