Google Launches Universal Commerce Protocol (UCP) for AI Agent Commerce — Backed by Stripe, Visa, Shopify, Walmart

GitHub·high signal

Google's Universal Commerce Protocol (UCP) has reached 2,712 stars as an open standard enabling AI agents to discover products, fill carts, and complete purchases across businesses and payment providers without custom integrations. Built on REST and JSON-RPC with native Agent2Agent (A2A), MCP, and Agent Payments Protocol support. Backed by Stripe, Visa, Mastercard, Shopify, Walmart, Target, Etsy, American Express, and 20+ partners — the broadest industry coalition behind any agent interop standard to date.