In order to use the API you must have the valid environment-specific username and password. Before any API requests, you need to obtain an API KEY. You will get a valid API KEY by using the VoC authentication API
The API KEY must be sent in the request authorization header element. If the API KEY value is valid then API request will be successful (http status code 200), otherwise it will fail (http status code 401). All API requests must be made over HTTPS.