REST API response codes

The following table describes the different categories of the response codes.

Category	Description
2xx	Indicates that the request was accepted successfully.
4xx	Returns the client-side error response with the error message.
5xx	Returns the server-side error response with the error message.

The following are some response codes that you will see in the REST API.

Response code	Status	Description
200	OK	Returned from GET and PUT operations, and non-configuration API calls such as Login or Logout when the request is successfully completed.
201	Created	Returned from POST operations when a new resource was successfully created.
204	No Content	Returned from a PUT, POST, or DELETE operation when the request was successfully processed and there is no content to return.
400	Bad request	A problem with the request body, such as invalid syntax, incorrectly formatted JSON, or data violating a database constraint.
401	Unauthorized	No active session for this client (the login API has not been called) or too many sessions already created from this client.
403	Forbidden	客户端会话有效,但是没有permissions to access the requested resource.
404	Not found	The resource does not exist, or the URI is incorrect for the desired resource. Can also occur when accessing the POST, PUT, or DELETE API while the REST access-mode is set to read-only.
500	Internal server error	An unexpected error has occurred in processing the request. View the logs on the device for details.
503	Service unavailable	The device is receiving more requests than it can process and is defensively rejecting requests to protect resources.