Universal Commerce Protocol (UCP)
Definition
The Universal Commerce Protocol, or UCP, is an open protocol that Google announced on January 11, 2026, with launch partners including Shopify, Etsy, Wayfair, Target, and Walmart. It lets a merchant expose its product catalog, and eventually its checkout, so that Google's AI surfaces, specifically AI Mode and Gemini, can show and sell those products natively.
UCP launched first as a catalog feed integrated through Google Merchant Center, using a dedicated native_commerce attribute. Google extended it in March 2026 to cover the cart as well, moving toward a fuller native checkout experience rather than only product discovery.
As of October 2026, UCP's native checkout remains limited to merchants based in the United States selling to customers in the United States, with no announced date for a European rollout. This mirrors the broader pattern in agentic commerce, where European and French merchants currently have earlier access to measurement and visibility tools than to native, agent-completed checkout.
UCP sits alongside OpenAI's Agentic Commerce Protocol (ACP) as a competing standard for the same underlying shift, and like ACP it depends on payment-network mechanisms such as Agentic Tokens to settle transactions securely. For brands, GEO work on AI Mode visibility now has a direct commercial extension through UCP once catalog and checkout data are properly structured.
Examples
A Shopify merchant in the United States connects its catalog to Google Merchant Center with the native_commerce attribute enabled. Its products can then appear with pricing and availability directly inside a Gemini shopping conversation.
A shopper asks Google's AI Mode to find a specific size of a product from a brand it already trusts. With UCP in place, AI Mode can show live stock and price for that exact item instead of only linking out to a generic search result.
Frequently Asked Questions
Who launched the Universal Commerce Protocol and when?
Google announced UCP on January 11, 2026, with Shopify, Etsy, Wayfair, Target, and Walmart as initial partners.
Is UCP available for French or European merchants?
Not for native checkout, as of October 2026. UCP's checkout capability is limited to merchants and customers based in the United States, though catalog-level integration through Google Merchant Center is a separate, broader mechanism.
What is the difference between UCP and ACP?
UCP is Google's protocol for making a catalog and checkout available inside AI Mode and Gemini. ACP is OpenAI and Stripe's equivalent for ChatGPT. They solve the same underlying problem for different AI platforms, and a merchant selling across platforms may eventually need to support both.
What does a merchant need to use UCP?
A product feed connected to Google Merchant Center with the native_commerce attribute, following Google's catalog requirements, with cart-level data added since the March 2026 extension for merchants pursuing the fuller checkout experience.
