In addition to APIs, MyTime provides webhooks functionality. Webhooks in MyTime are callbacks, triggered by some event, that is sent automatically to some merchant-defined endpoint. For example, if you want to receive appointment payloads, you may define an endpoint such as "merchant.com/receive_appointments", and any time an appointment in MyTime is created or updated, a JSON payload will be sent to that endpoint.
To configure webhooks, learn more here.