Google announced UCP (Universal Commerce Protocol) two days ago. I realized developers building AI shopping agents have no real merchant to test against, so I built one.
Live sandbox: https://puddingheroes.com/api/ucp/
What you can do:
- Discovery endpoint at /.well-known/ucp.json
- Browse 9 products (books, vacation rental, memberships, experiences)
- Complete fake checkouts with payment_token: "sandbox_test"
- Get a real PDF download for the free item (not a mock)
curl https://puddingheroes.com/api/ucp/test
The products are from my actual business (sci-fi novel, Airbnb property, community membership) so it's realistic test data, not lorem ipsum.
GitHub: https://github.com/steven2030/ucp-merchant
Built with Flask. MIT licensed. PRs welcome.
Google announced UCP (Universal Commerce Protocol) two days ago. I realized developers building AI shopping agents have no real merchant to test against, so I built one.