Booking.com Demand API
The Demand API is Booking.com's RESTful JSON API for affiliate partners: search and book accommodations, car rentals, attractions and transfers, preview and create orders, manage cancellations and modifications, and read reviews, locations, languages and payment constants. Version 3.2 is current; 3.1 remains published and a 3.2-Beta track carries attractions, transfers, smart search and the messaging endpoints.