What merchants need to know about Google’s Universal Commerce Protocol (UCP)
Google launched the Universal Commerce Protocol (UCP) on January 11. It’s an open standard that allows shoppers to directly purchase products inside AI Mode in Search and the Gemini app.
Here’s what UCP is, how it works, and what else Google announced alongside it.
What is the Universal Commerce Protocol?
UCP is the infrastructure layer that lets agentic AI complete purchases on behalf of shoppers. A shopper describes what they’re looking for, the AI recommends products, and checkout happens within the conversation.
Google co-developed UCP with retail and e-commerce powerhouses such as Shopify, Etsy, Wayfair, Target, Walmart, and Zalando. On the payments side, Stripe, Visa, Mastercard, Adyen, and American Express are involved.
The protocol is open-source and designed to be interoperable with other standards, including OpenAI’s Agentic Commerce Protocol (ACP), Microsoft’s Agent2Agent (A2A), and Anthropic’s Model Context Protocol (MCP).
How does UCP work?
Traditional Google Shopping flow:
- Shopper searches
- Sees product listings
- Clicks through to merchant site
- Completes checkout on site
AI Mode with UCP:
- Shopper asks a question in natural language
- AI matches the shopper’s question to product feed attributes
- AI recommends products
- Shopper completes checkout in the conversation
The product data powering AI Mode comes from Merchant Center, which means the feed merchants are already sending to Google is what the AI uses to match products to queries.
However, AI Mode doesn’t match keywords the way traditional Shopping does. It interprets intent and matches against structured product attributes. A query like “lightweight waterproof jacket for cycling in the rain under €150” requires the AI to find those specific attributes in your feed data.
What else did Google announce?
UCP was the headline, but Google launched several other tools and products alongside it:
Business Agent
Branded AI chatbots that appear directly in Google Search results. Shoppers can ask product questions and get answers in your brand’s voice during their search. Google’s roadmap includes the ability to train the agent on your own data, access customer insights, and enable purchases directly within the chat.
US merchants can opt in through Merchant Center, and the first brands are already live: Lowe’s, Michaels, Poshmark, and Reebok.
New Merchant Center data attributes
Google is rolling out new data fields designed for conversational commerce. These will include common product questions, compatible accessories or substitutes.
The full specifications aren’t public yet. Google is starting with a small group of merchants and will expand over the coming months.
Direct Offers
A new Google Ads pilot for AI Mode. Instead of bidding on keywords, advertisers can surface exclusive offers (discounts, bundles, free shipping) that appear contextually when a shopper’s query matches.
Petco, e.l.f. Cosmetics, Samsonite, and Rugs USA are in the pilot. Google plans to expand beyond discounts to other value attributes.
Checkout in AI Mode
UCP powers a checkout feature on eligible product listings in AI Mode and the Gemini app. US shoppers can complete purchases using Google Pay with payment methods and shipping info already saved in Google Wallet. PayPal support is coming.
Merchants remain the seller of record. You keep the customer data, handle returns, and own the relationship. Google facilitates the transaction; you own it.
How does UCP fit with other protocols?
Google announcement follows recent developments from competing players, showing AI commerce infrastructure is taking shape:
- OpenAI and Stripe launched the Agentic Commerce Protocol (ACP) in September 2025. It powers Instant Checkout in ChatGPT. Shopify and Etsy merchants are already enabled.
- Microsoftlaunched Copilot Checkout in January 2026, also built on ACP. Shopify merchants are auto-enrolled.
- Anthropic’sModel Context Protocol (MCP) provides the foundational data layer on which multiple commerce protocols are built. It enables real-time access to inventory, pricing, and product information.
These protocols are designed to be interoperable. Google explicitly states UCP works alongside ACP, A2A, and MCP. A merchant investing in structured product data benefits across all platforms, not just Google.
What does this mean for merchants?
Your Merchant Center feed powers AI Mode
The product data you’re already sending to Google is what AI Mode uses for discovery and recommendations. No separate integration required. But AI surfaces products differently than traditional Shopping, matching against structured attributes rather than keywords. It will be very interesting to see how this reshapes how merchants reach their customers.
Feed quality matters (even) more
Products with rich, detailed attributes are more likely to surface in AI Mode. Products with minimal data may not. The difference between “good enough for Shopping” and “ready for AI discovery” is attribute depth.
A new opportunity to reach shoppers, alongside traditional Shopping
AI Mode in Search and Gemini native e-commerce are a new type of discovery, not a replacement for existing Shopping campaigns. Your current setup continues to work. But as AI Mode scales, it’s fair to assume the merchants with the strongest product data will have an advantage across both surfaces.
You stay in control
UCP keeps merchants as the Merchant of Record. Customer data, returns, loyalty programs, and post-purchase experience remain yours. Google handles the AI conversation and payment facilitation; you own the transaction and the relationship.
European availability
UCP is live in the US now. Google has committed to global expansion but hasn’t announced specific European dates. Zalando’s involvement as a UCP partner suggests Europe is a priority, but the timeline remains unclear.
What comes next
Google’s roadmap for UCP includes multiple new developments, including multi-item carts, loyalty program integration, related product discovery, custom shopping experiences, and expanded global availability.
The new Merchant Center attributes are rolling out gradually. Business Agent capabilities will expand to include training on merchant data and direct purchase functionality.
We’re tracking these developments closely. As more details emerge on the new data attributes and European rollout, we’ll share what we learn.
Learn more
Curious how a Premium CSS Partner can help you stay ahead in this evolving landscape? Don’t hesitate to get in touch:https://business.shoparize.com/en/contact
