These status codes are returned by the APIs:

200SuccessThe request succeeded.
400Bad RequestUnable to authenticate.
401UnauthorizedThe system/user is not authorized to use the API.
404Not foundThe requested resource was not found.
405Method not allowedThe HTTP action is either not allowed for the requested REST API or not supported by any API.
407Proxy Authentication RequiredToken expired.
410GoneTenant is either unavailable or deactivated.
429Too Many RequestsAPI rate limit is reached and request made after the rate limit fails.
500Internal Server ErrorThe server encountered an unexpected condition preventing server from fulfilling the request.