RoomKeyPMS POS Integration API
Lets a third-party point-of-sale system (restaurant, retail, spa) look up a guest by room number and post a charge to that guest's folio as a room charge, so on-property spend outside the PMS lands on the guest's bill. Room lookup returns guest/room status; charge posting requires a configured CostCentre per property and is subject to per-guest credit-limit and payment-method rules set in RoomKeyPMS. The in-house guest list endpoint is shared with the Reservation Data API and is commonly used to validate a room/guest pairing before posting a charge.