Google has published an official help page detailing how the Universal Commerce Protocol UCP and its UCP powered checkout work across Google surfaces.
UCP was first announced as part of Google’s agentic shopping expansion in January and later confirmed as live in Merchant Center. Now, the new documentation clarifies how merchants can implement the native_commerce attribute to enable a Buy button that moves checkout directly onto Google while remaining the seller of record. Payments rely on Google Wallet credentials, payment processors must support Google Pay tokens, and product data is synced through Merchant Center for accurate listings.
The help page also reinforces that UCP powers agentic checkout in experiences like Gemini and Google AI Mode, positioning it as core infrastructure for AI driven commerce across Google.
Read the official help page spotted by Hana Kobzová here: About the Universal Commerce Protocol (UCP) and UCP-powered checkout feature on Google.