Register a new webhook for call events. Only one global webhook (blank phone_number_id) is allowed per user. Only one webhook per phone number is allowed.
Bearer auth header. Pass with value 'Bearer {api_key}'. Api key can be found in account Settings -> API Keys page
HTTPS URL to receive webhook events
SID of the API key to use for webhook authentication
SID of the phone number to attach the webhook to. Leave blank for a global webhook.
Whether to trigger webhook on call started event
Whether to trigger webhook on call ended event