Google plans to adopt UCP draft spec for AI Mode hotel booking
Google has announced it will adopt the Universal Commerce Protocol (UCP) draft specification for its hotel booking feature in AI Mode. The UCP project released the Lodging Booking draft on GitHub on September 25, providing a public standard for how platforms manage reservations. Google’s developer documentation states this adoption will occur over the coming months, following the initial rollout…
Key points
- Google plans to adopt the UCP Lodging Booking draft for AI Mode hotel bookings over coming months.
- UCP integration does not change property ranking, and businesses remain the merchant of record.
- The draft spec covers REST/MCP booking sessions, real-time pricing, and payment extensions.
The specification covers technical details for managing booking sessions via REST or MCP, including real-time pricing, availability checks, and payment extensions. It clarifies commercial terms for hotel partners: integrating with UCP does not affect property ranking in listings, and the business remains the merchant of record, retaining customer data and governing terms. The draft also notes that PCI DSS compliance is not required for card payments, though bookings must generally be finalized by a person unless using specific agent-led payment extensions.
Currently, businesses interested in the integration can only join a waitlist, as detailed onboarding instructions are pending. The Lodging Technical Council, which includes major players like Amadeus, Booking.com, Expedia, Hilton, and Marriott, contributed to the development. The draft is open for public feedback, with potential future extensions for multi-room bookings.
Google Plans To Adopt UCP Draft Spec For AI Mode Hotel Booking via @sejournal, @MattGSouthern
Search Engine Journal · 28 September 2026
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