Status Codes

When you call any of the REST resources, the Response header returns one of the standard HTTP status codes defined in the following table. :

HTTP Status Code	Description
200 OK	The request was successfully completed. A 200 status is returned for a successful GET or POST method.
204 Accepted	The request was successfully completed.
400 Bad Request	The request could not be processed because it contains missing or invalid information (such as, a validation error on an input field, a missing required value, and so on).
401 Unauthorized	The request is not authorized. The authentication credentials included with this request are missing or invalid.
404 Not Found	The request includes a resource URI that does not exist.
405 Invalid input	The input specified in the reques is not supported for this request URI.
500 Internal Server Error	The server encountered an unexpected condition that prevented it from fulfilling the request.
503 Service Unavailable	The server is unable to handle the request due to temporary overloading or maintenance of the server. The <ProductName> REST web application is not currently running.