Under the Hood: Universal Commerce Protocol (UCP)- Google Developers Blog

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This post introduces the Universal Commerce Protocol (UCP), an open-source standard for agentic commerce. It details UCP's architecture, benefits for various ecosystem participants (businesses, AI platforms, developers, payment providers, consumers), and the technical case for a new, flexible standard to address integration bottlenecks. The post provides a step-by-step guide with code examples for setting up a business server, discovering capabilities via a /.well-known/ucp endpoint, and invoking checkout and discount capabilities using sample products and a demo flower shop.