Tray has 5 verified Tray stores currently verified by UCP Checker. The leaderboard above shows the top 20 stores ranked by declared capability depth — the ones most likely to give an AI agent a complete end-to-end shopping experience.

Publishing a UCP manifest on Tray means serving a valid JSON document at /.well-known/ucp on your store's origin domain. Depending on your stack this can be handled via a custom app, a platform-level feature (where available), or by proxying the endpoint through your CDN. Once published, our crawler will auto-detect it on the next 24h cycle.

We re-crawl every known Tray storefront at least every 24 hours and re-check any store you manually trigger a fresh check on. The counts, leaderboard, and capability coverage on this page update automatically — the data you're looking at is never more than a day old.

Yes — just run a live check on your domain. If you publish a valid UCP manifest at /.well-known/ucp you'll appear on this page automatically on the next crawl cycle. No signup, no fee, no gatekeeping.