Groupon Bookable Appointments API
REST contract for wellness, beauty and services booking systems. Groupon polls the partner's system roughly every 60 minutes to cache merchants, services, staff and availability, performs a real-time availability check before checkout, creates the booking, propagates cancellations initiated on Groupon's side, and updates booking status on redemption. Groupon publishes the OpenAPI and CONSUMES the contract — the endpoints run on the partner's own host, so there is no Groupon-hosted base URL for this API and none has been invented.