UCP Checker
Check a store

UCP Score leaderboard

The stores we check, ranked by UCP Score: a number from 0 to 100 for how well a store's UCP profile follows the spec and what it lets a UCP agent do, made of Discovery, Conformance and Capabilities.

about 20,000stores we could score
90average UCP Score
92.3%score 85 or more (grade A)

Where the points go

average part score out of 100
Grade A stores
Discovery98
Conformance88
Capabilities92
Every other store we could score
Discovery90
Conformance71
Capabilities38

The UCP Score weighs Discovery 30%, Conformance 40% and Capabilities 30%. How the score is made →

Most common fixes

share of the stores we could score
SHOULD The profile has no ETag or Last-Modified header

Send an ETag or Last-Modified header with /.well-known/ucp so agents can revalidate their cached copy cheaply.

43%
MUST The profile isn't served with the caching the spec requires

Serve /.well-known/ucp with "Cache-Control: public, max-age=300" (public, at least 60 seconds, never private, no-store or no-cache).

41.2%
SHOULD supported_versions isn't laid out the way the spec says

Make supported_versions an object: each key a protocol version date, each value the https URL of the profile for that version.

1.2%

Spec checks every status page shows. Each store's own fixes are on its status page.

Grades

stores we could score
A · 85–10092.3%
B · 70–845.3%
C · 50–690.2%
D · 30–492.2%
F · 0–290%

By store platform

average UCP Score
Shopify96
Wix85
Custom or not identified53
Salla95
Shoptet88
Zid75
Jumpseller79
Tray79

Matching stores

first 50 of 533
RankStoreScore ↑ DiscoveryConformanceCapabilities Store platform
20418 dickblick.cominvalid 34 D 68 33 0 Custom or not identified
20418 revolve.cominvalid 34 D 68 33 0 Custom or not identified
20417 githubstatus.cominvalid 35 D 73 33 0 Custom or not identified
20386 1800contacts.cominvalid 36 D 75 33 0 Custom or not identified
20386 5nplus.cominvalid 36 D 75 33 0 Custom or not identified
20386 admin.shopify.cominvalid 36 D 75 33 0 Custom or not identified
20386 advanceautoparts.cominvalid 36 D 75 33 0 Custom or not identified
20386 aliexpress.cominvalid 36 D 75 33 0 Custom or not identified
20386 canda.cominvalid 36 D 75 33 0 Custom or not identified
20386 common-buy-intl.alibabacloud.cominvalid 36 D 75 33 0 Custom or not identified
20386 crucial.cominvalid 36 D 75 33 0 Custom or not identified
20386 datart.czinvalid 36 D 75 33 0 Custom or not identified
20386 de.dawanda.cominvalid 36 D 75 33 0 Custom or not identified
20386 ecco.cominvalid 36 D 75 33 0 Custom or not identified
20386 grainger.cominvalid 36 D 75 33 0 Custom or not identified
20386 harborfreight.cominvalid 36 D 75 33 0 Custom or not identified
20386 hgspot.hrinvalid 36 D 75 33 0 Custom or not identified
20386 hudsonnewsdistributors.cominvalid 36 D 75 33 0 Custom or not identified
20386 idacatering.co.ukinvalid 36 D 75 33 0 Custom or not identified
20386 kasa.czinvalid 36 D 75 33 0 Custom or not identified
20386 leclerc.frinvalid 36 D 75 33 0 Custom or not identified
20386 livegoodtour.cominvalid 36 D 75 33 0 Custom or not identified
20386 lufthansa.cominvalid 36 D 75 33 0 Custom or not identified
20386 micromania.frinvalid 36 D 75 33 0 Custom or not identified
20386 mitchellstores.cominvalid 36 D 75 33 0 Custom or not identified
20386 myntra.cominvalid 36 D 75 33 0 Custom or not identified
20386 nix.ruinvalid 36 D 75 33 0 Custom or not identified
20386 pepboys.cominvalid 36 D 75 33 0 Custom or not identified
20386 shoplet.cominvalid 36 D 75 33 0 Custom or not identified
20386 signetjewelers.cominvalid 36 D 75 33 0 Custom or not identified
20386 sonostarhub.cominvalid 36 D 75 33 0 Custom or not identified
20386 tirerack.cominvalid 36 D 75 33 0 Custom or not identified
20386 tsbrass.cominvalid 36 D 75 33 0 Custom or not identified
20386 wildberries.ruinvalid 36 D 75 33 0 Custom or not identified
20277 accor.cominvalid 37 D 80 33 0 Custom or not identified
20277 addidas.usinvalid 37 D 80 33 0 Custom or not identified
20277 ais-dev-tg3dfdciuv343rkman6bcy-866272115403.asia-southeast1.run.appinvalid 37 D 80 33 0 Custom or not identified
20277 alfatools.cominvalid 37 D 80 33 0 Custom or not identified
20277 alicesgarden.frinvalid 37 D 80 33 0 Custom or not identified
20277 alllbirds.cominvalid 37 D 80 33 0 Custom or not identified
20277 ateliercologne.cominvalid 37 D 80 33 0 Custom or not identified
20277 babyyogahouse.cominvalid 37 D 80 33 0 Custom or not identified
20277 bedbathandbeyond.cominvalid 37 D 80 33 0 Custom or not identified
20277 big.ptinvalid 37 D 80 33 0 Custom or not identified
20277 bkstr.cominvalid 37 D 80 33 0 Custom or not identified
20277 bobevans.cominvalid 37 D 80 33 0 Custom or not identified
20277 brands.zepto.co.ininvalid 37 D 80 33 0 Custom or not identified
20277 breadfinancial.cominvalid 37 D 80 33 0 Custom or not identified
20277 britishairways.cominvalid 37 D 80 33 0 Custom or not identified
20277 burberry.cominvalid 37 D 80 33 0 Custom or not identified

Stores whose UCP profile we could read, valid or not; not found, blocked and unreachable stores have no score. Stores with the same score share a rank. Each store links to its score page.