Booking correctness
- Booking writes are checked inside a transaction
- Idempotency keys keep retries safe
- External busy windows are checked again before save
Scheduling features you can use in the app and the API.
OpenCalendly keeps the product experience and backend behavior close together, so what you click in the UI matches what runs underneath.
Capability matrix
Organizer operations
- Create, edit, and review event types
- Manage availability rules and overrides
- Run teams and team event types from one place
Lifecycle automation
- Confirmation, cancel, and reschedule emails
- Webhook subscriptions with delivery controls
- Writeback queue visibility and retries