calendly.createEventInvitee books a selected start time. Calendly requires Standard or above and applies stricter rate limits to this endpoint.
automations/book-calendly-invitee.automation.ts
eventType, startTime, and invitee email and timezone are required. Supply either name or firstName; you can add lastName and textReminderNumber. Optional fields include the event type’s matching location, required questionsAndAnswers, tracking values, and up to 10 eventGuests. This mutation is not replay-safe; retry only after confirming Calendly did not create the invitee.