UCP Checker Lab

Agent experiments on real stores

We send the same AI shopping agent to real stores, change one thing, and publish what happened: how far it got toward checkout, how long it took and what it cost. Every run is recorded, and no run ever pays.

Results

Two doors to checkout

The same shopping task at the same Shopify store, once through its UCP endpoint and once through the WebMCP tools on its web page.

The runs happen in UCP Playground, which signs its requests as an identified agent. UCP Checker publishes the results; it measures from outside and is not affiliated with any store, platform or protocol body.