# Google plans to adopt UCP draft spec for AI Mode hotel booking

Digest AI · Marketing & Small Business · published 2026-09-28T13:44:16Z

Canonical: https://digestai.news/story/google-plans-to-adopt-ucp-draft-spec-for-ai-mode-hotel-booking

## Summary

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 of hotel booking in AI Mode for U.S. English users on August 27.

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.

## 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.

## Why it matters

This establishes a public standard for AI-driven hotel bookings, clarifying that AI integration does not penalize search rankings. It allows hotels to maintain customer ownership while leveraging Google's AI surfaces for discovery and transactions.

## Sources

1. [Google Plans To Adopt UCP Draft Spec For AI Mode Hotel Booking via @sejournal, @MattGSouthern](https://searchenginejournal.com/google-plans-to-adopt-ucp-draft-spec-for-ai-mode-hotel-booking/591235) (Search Engine Journal, 2026-09-28)

## Cite

Digest AI, "Google plans to adopt UCP draft spec for AI Mode hotel booking", 28 September 2026, https://digestai.news/story/google-plans-to-adopt-ucp-draft-spec-for-ai-mode-hotel-booking

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