All API requests generate responses.
Successful requests return either a:
200 - OK --The request completed successfully
201 - Created -- A new resource has been created successfully
Response codes in the 400 to 499 range are generally related to business validation errors.
Response codes in the 500 to 503 range are related to API service issues.
For full details of all possible Response Codes see the HTTP Response Codes section of the API Reference.