Universal Commerce Protocol (UCP)
A proposed common standard meant to let any AI agent interact with any online store using the same rules.
What is Universal Commerce Protocol (UCP)?
UCP is a proposed common standard meant to let any AI shopping agent interact with any online store using the same shared set of rules for browsing, carts, and checkout, rather than every retailer needing a separate integration for every AI assistant. For example, a single UCP-compliant integration would let a retailer's catalog and checkout be usable by an AI agent from any company that also speaks UCP. It's meant to do for AI shopping what a shared checkout standard does for regular e-commerce.
Why it matters
Google unveiled the Universal Commerce Protocol at the National Retail Federation's NRF 2026 keynote on January 11, 2026, as an open-source standard developed with retailers including Shopify, Etsy, Wayfair, Target, and Walmart, and endorsed by more than 20 partners across payments and retail, including Visa, Mastercard, American Express, Adyen, and Stripe. UCP defines common primitives, such as product discovery, cart state, and order data, that let a consumer-facing surface (a chat assistant, a voice device) talk to any participating merchant's backend without one-off integrations, and it is explicitly designed to interoperate with Google's Agent Payments Protocol (AP2) for the payment-authorization layer. It builds on and generalizes earlier, narrower Google commerce data efforts and is positioned as a peer, and potential complement, to OpenAI/Stripe's ACP rather than a direct successor to it.