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Merchant Center adds a hub for Google's AI checkout
Merchant Center now has a UCP integration hub under Settings. It covers setup, sandbox testing, production validation, and an Analytics tab for the checkout funnel.
Jerry Quin2 min read3 sources
Illustration: The Keywordless.
The short answer
What changed
Merchant Center now has a UCP integration hub, found under Settings, then UCP integration. UCP is the Universal Commerce Protocol, the standard behind the Buy button on eligible listings in AI Mode and Gemini. The hub walks you through setup, sandbox testing and production validation, and an Analytics tab tracks your checkout funnel.
Who has it
It's rolling out gradually in the US, with Australia and Canada to follow next year. You only get it after you finish the technical work, fill out Google's interest form and get selected.
What I'd do this week
Check Settings in Merchant Center for the tab, and if it isn't there, get your return policy and customer support info filled in now, since checkout needs both.
You pick how far Google's checkout goes
The hub asks which capabilities you support. There are three:
- Transfer to merchant cart. Shoppers add items on Google, then finish checkout on your site. Google calls this a fast-track path that doesn't need full product feed setup, product warnings or customer support info.
- Native checkout on Google. Shoppers buy without leaving Google. You build three REST endpoints, for creating, updating and completing a checkout.
- Identity linking. This uses OAuth 2.0 for loyalty benefits and signed-in checkout, and you can only pick it if you also pick native checkout.
You can do cart transfer, native checkout or both. If you pick both, you finish both checklists.
Test it before it touches a real order
The sandbox page lets you point Google at your UCP profile file and simulate cart and checkout requests, then read back what your server returns. After the production checklist, Google Support reviews the integration and tells you whether you're live or what to fix.
My take
Cart transfer is the one I'd look at first. It keeps the sale on your site and skips the heaviest requirements, so you can learn how shoppers use the Buy flow without handing over the whole checkout. Native checkout is a bigger commitment, and it's the developers' call more than the ad manager's.
For the ads side, the prep is the same either way. Google says Merchant Center stays the hub for the product data behind ads and listings, so a clean feed is still the best thing you can do. If you're on a third-party platform, Google says to ask that provider about its UCP plans.
Sources
How to start UCP integration in Merchant Centerdevelopers.google.com/merchant/ucp/guides/tools/merchant-center/integrationGoogle for Developers. Checked Oct 12, 2026.How to onboard to the UCP integration hub in Merchant Centersupport.google.com/merchants/answer/16992327Google Merchant Center Help. Checked Oct 12, 2026.Prepare your Merchant Center accountdevelopers.google.com/merchant/ucp/guides/overview/merchant-centerGoogle for Developers. Checked Oct 12, 2026.Jerry Quin
Jerry Quin is the pen name of a paid media practitioner who has managed Google Ads accounts at an agency for 10 years. He writes about Google Ads, Microsoft Ads, ChatGPT Ads, and the rest of paid media and digital marketing, from what's rolling out to what he'd actually do about it.