UCP (Universal Commerce Protocol) is an open standard to make commerce interoperable between platforms, AI agents, and merchants.

This repo curates: - the core UCP spec - SDKs and reference implementations - client/server examples - related protocols and tooling

If you’re building agentic shopping flows, commerce automation, or system-to-system checkout without one-off integrations, this is meant to save you time and reduce glue code.

Early ecosystem, contributions welcome.

Built a free validator for this at ucptools.dev - checks /.well-known/ucp compliance against the spec and gives A-F grading with specific fix recommendations.

Interesting finding: tested major retailers and even google.com returns 404 on their UCP endpoint. Early days.

Also made an Apify Actor for bulk validation if anyone needs to check multiple domains programmatically.

This is how shopping will be done in the future.