Adding an API Sign in to the Rhythm website as a site editor or tenant administrator. Click the Menu button. Click the Control Panel tab. Click Rhythm API Wrapper. Click Add ION API. Specify this information: Ion API Name Specify the name that you use to identify this API. This name must be unique in the tenant. Base URL Specify the base URL of the API Gateway. See Finding the API endpoint URL. Credentials Specify the credentials to use to access the API. Specify this information in json format. Click Save.