Automate interview scheduling with the Calendly API

Steps

1. Generate a Personal Access Token (PAT) or use OAuth 2.0 from the Calendly developer portal at developer.calendly.com; include the token as 'Bearer your-access-token' in the Authorization header on all requests to https://api.calendly.com
2. Retrieve the current user's organization URI by calling GET /users/me; use the organization value to scope subsequent queries
3. List available event types via GET /event_types?user={userUri} to retrieve the event type URI and slug for the interview type you want to book
4. Retrieve available time slots by calling GET /event_type_available_times?event_type={eventTypeUri}&start_time={ISO8601}&end_time={ISO8601}; select a start_time from the returned slots
5. To programmatically create a booking without redirecting the user to Calendly UI, use the Create Event Invitee (Scheduling API) endpoint — POST /scheduled_events/{eventUuid}/invitees with the candidate's name and email; note this endpoint requires a paid Calendly plan
6. Subscribe to webhook events (invitee.created, invitee.canceled) via POST /webhook_subscriptions to receive real-time booking notifications and sync them back to your ATS