Platform
Custom & Headless UCP Adoption
Stores built on bespoke stacks, headless frontends, or Rails/Django/Node backends.
Verified
121
Custom & Headless stores with valid profiles
Avg UCP Score
85/100A
average across verified stores
Avg latency
457ms
profile response time
Avg capabilities
2.0
declared per verified store
About Custom & Headless
Custom stores have the most flexibility in UCP implementation — they typically publish profiles directly from their API gateway and often expose the deepest capability surface.
Leaderboard
Top Custom & Headless stores by UCP Score
Verified Custom & Headless stores ranked by their composite UCP Score. See full leaderboard for Custom & Headless →
1
devucp.netsgroup.com
100AScore
6caps
295mslatency
2
assistant-experiments.vercel.app
100AScore
5caps
230mslatency
3
book.hugocatarino.com
99AScore
3caps
801mslatency
4
ticketfairy.com
99AScore
3caps
394mslatency
5
acs-exploration.vercel.app
97AScore
5caps
1044mslatency
6
jrqxx1a5.finqustore.dev
96AScore
6caps
516mslatency
7
food.ucpsandbox.com
96AScore
4caps
292mslatency
8
eshop.andyhoang.me
96AScore
3caps
595mslatency
9
flowers-fhix.ucpsandbox.com
95AScore
4caps
361mslatency
10
flowers-fhix-a.ucpsandbox.com
95AScore
4caps
434mslatency
11
flowers.ucpsandbox.com
95AScore
4caps
363mslatency
12
scvd.store
95AScore
3caps
534mslatency
13
petcircle.com.au
93AScore
4caps
450mslatency
14
webside.gr
93AScore
3caps
610mslatency
15
gentle-enough.ucp.consumergenie.net
93AScore
3caps
1486mslatency
16
magenxcommerce.com
92AScore
4caps
623mslatency
17
practical.stream
92AScore
2caps
140mslatency
18
vibeshop.cz
91AScore
3caps
387mslatency
19
commerciovirtuoso.it
91AScore
3caps
179mslatency
20
146.59.63.162.sslip.io
90AScore
4caps
340mslatency
book.hugocatarino.com
99AScore
3caps
801mslatency
4
acs-exploration.vercel.app
97AScore
5caps
1044mslatency
6
jrqxx1a5.finqustore.dev
96AScore
6caps
516mslatency
7
scvd.store
95AScore
3caps
534mslatency
13
petcircle.com.au
93AScore
4caps
450mslatency
14
webside.gr
93AScore
3caps
610mslatency
15
magenxcommerce.com
92AScore
4caps
623mslatency
17
practical.stream
92AScore
2caps
140mslatency
18
vibeshop.cz
91AScore
3caps
387mslatency
19
commerciovirtuoso.it
91AScore
3caps
179mslatency
20
Coverage
What Custom & Headless stores declare
Live breakdown of which UCP capabilities and transports are most commonly declared in verified Custom & Headless profiles.
Top capabilities
- Catalog Search79 (65%)
- Checkout56 (46%)
- Catalog Lookup55 (45%)
- Order Management39 (32%)
- Fulfillment31 (26%)
- Cart30 (25%)
- Discount18 (15%)
- Identity Linking16 (13%)
- Buyer Consent9 (7%)
- Location Lookup6 (5%)
- Com Ucpchecker Domain Check5 (4%)
- Com Ucpchecker Bulk Check5 (4%)
Recently Verified
Latest Custom & Headless stores to go live
Run a fresh check on your Custom & Headless store
Paste any domain and see the full UCP diagnostic — profile validation, capabilities, transports, and bot access. Free, no signup.
Frequently Asked
About Custom & Headless on UCP Checker
How many Custom & Headless stores support UCP?
Custom & Headless has 121 verified Custom & Headless 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.
How do I publish a UCP profile on Custom & Headless?
Publishing a UCP profile on Custom & Headless 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.How often is the Custom & Headless list updated?
We re-crawl every known Custom & Headless 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.
Can I add my Custom & Headless store to UCP Checker?
Yes — just run a live check on your domain. If you publish a valid UCP profile at
/.well-known/ucp you'll appear on this page automatically on the next crawl cycle. No signup, no fee, no gatekeeping.