Google gave the protocol away, because the protocol was never the lock-in.

In May 2026 Google extended its Universal Commerce Protocol, the standard for AI agents to book and pay, to hotels.

In May, at its I/O developer conference, Google extended the Universal Commerce Protocol (UCP) to hotels. It launched the protocol in retail in January and has been adding one vertical at a time since. Hotels in May. Food named as next. UCP is the framework for how an AI agent finds, books and pays for a room inside a conversation, with no website in between. Google named Amadeus as its B2B hospitality partner for it.

The easy take is that Google just took control of hotel booking. But that’s wrong, and it’s worth understanding why, because the same thing is coming for restaurants.

UCP is open. It’s published on GitHub under an Apache licence, anyone can implement it, and it’s an open standard like MCP. Nothing stops an independent vendor building an agent that uses UCP to talk straight to a hotel or a restaurant’s own systems and book direct, with Google nowhere in the path. The protocol was never going to be the lock-in. Google gave it away.

So where is the catch. It isn’t the plumbing, it’s the audience. You can build an agent that bypasses Google. Getting anyone to open and use it instead of typing into Search or asking Gemini is the hard part. Google doesn’t need to own the standard. It owns the place the question gets asked.

Restaurants have seen this before. Reserve with Google didn’t win because it was closed or lose because it was open. It won because it was there when a diner decided where to eat, and providers built into it to be a part of it.

You can already see where this goes. Restaurants in Reserve with Google are surfacing in AI Mode now. The venues sitting in Google’s format get carried into the agentic channel as it arrives, and my read is the restaurant version of UCP won’t be built separately at all. It will fold into what Google already runs.

Which leaves the independent reservation platform in a hard place. Implementing UCP is table stakes. It makes your venues bookable by everyone’s agents, Google’s included. It does not make you the agent anyone uses. So the choice is up to you. Accept being a supply rail that every agent plugs into, or fight for the surface and the audience and lose to Google.

Here is where I would put my money. The independent doesn’t win by becoming a destination. It wins by being the cleanest, broadest, most reliably bookable inventory on every agent surface, the rail none of them can skip. You can’t out-audience Google. You don’t have to. You have to be everywhere, and be the one platform without an owner quietly steering that audience somewhere else. Neutrality becomes the product. That’s my read, and I’m not certain of it.