UCP Checker
Check a store
UCP Score

UCP Score for fabricadehostias.com.br

Nearly there

80 out of 100, grade B: nearly there. The missing 20 points are spread across Conformance and Capabilities. 2 spec breaks on the status page aren't counted in the score.

Discovery 100Conformance 88Capabilities 48release 2026-08-25

UCP Score 80/100 grade B · nearly there
Points missing 20 Conformance, Capabilities Fixes 1 takes it to 100 Spec breaks 2 not in the score

How the score is made

three areas, weighted
Discovery 30%
Can a UCP agent find and read the profile: HTTPS, an answer at /.well-known/ucp, robots.txt allowing it, and five files outside UCP (llms.txt, sitemap, Open Graph, Organization schema, viewport).
100full marks
Conformance 40%
Does the profile follow the spec: valid against its release (counted three times), a dated release, keys published, few warnings, spec and schema links that resolve.
88−4.8 pts
Capabilities 30%
What an agent can do here: how many capabilities, checkout, at least one service, payment handlers, and services that answer our check.
48−15.6 pts
A85–100Ready for UCP agents
B70–84Nearly there
C50–69Partly ready
D30–49Hard for UCP agents
F0–29Not ready

Raise the score

fixes that move the number
+5
1Cryptographic message signing is not yet enabled
Your UCP profile lists no public keys, so cryptographic message signing is not yet enabled for this store. HTTPS already confirms your store's identity; signing adds a further layer for checkout, payment and webhook messages.
The UCP spec recommends signing checkout completion and payment responses, and requires it for webhooks. A store that sends order updates by webhook needs keys; others can add them later.
Conformance · effort medium 
{
  "keys": [
    {
      "kty": "EC",
      "crv": "P-256",
      "x": "<base64url x>",
      "y": "<base64url y>",
      "kid": "store-2026-10",
      "use": "sig",
      "alg": "ES256"
    }
  ],
  "ucp": { ... }
}

Create a P-256 (ES256) key pair: ES256 is the one algorithm every UCP agent must be able to check. Add the public key to a "keys" list at the top level of your UCP profile, as in the example, with its own "kid", and keep the private key on your server. The spec recommends a new key every 90 days: publish the new one next to the old, sign with it, and remove the old key a week later.

Every check

11 passed · 5 to fix
Agent Discovery · 8 of 8
8 OK
HTTPS, UCP profile reachable, AI bot access, llms.txt, sitemap.xml, Open Graph tags, Organization schema (JSON-LD), Mobile viewport metaShow
  • HTTPS · Profile URL uses https://
  • UCP profile reachable · HTTP 200
  • AI bot access · robots.txt allows /.well-known/ucp
  • llms.txt · Found at /llms.txt
  • sitemap.xml · Found at /sitemap.xml
  • Open Graph tags · og:title and og:type/url present
  • Organization schema (JSON-LD) · Organization-typed JSON-LD detected
  • Mobile viewport meta · <meta name="viewport"> present
UCP Conformance · 2 of 4
2 OK
Profile passes schema validation, Protocol version present and well-formedShow
  • Profile passes schema validation · No structural errors
  • Protocol version present and well-formed · Version: 2026-08-25
To fix
Public keys published
No keys list at the top level of the profile. Fix 1 above.
Conformance
To fix
No validation warnings
1 warning.
Conformance
Capability Coverage · 1 of 4
1 OK
Transports declaredShow
  • Transports declared · MCP
To fix
Capabilities declared
1 of 6 capability families detected: Catalog. A family counts once however many namespaces or extensions declare it.
Capabilities
Problem
Checkout capability
No checkout capability.
Capabilities
To fix
Payment handlers
Empty array: checkout-link redirect strategy.
Capabilities

Not in the score, but worth fixing first

spec breaks
Problem
The profile isn't served with the caching the spec requires
Served with Cache-Control "max-age=14400". Spec level: MUST.
on the status page
To fix
The profile has no ETag or Last-Modified header
Spec level: SHOULD.
on the status page

The score measures what the profile declares across the three areas above. These break a rule in the spec that agents follow, so they can stop an agent before the score matters.

Speed among Tray stores
The profile answered in 12 ms, faster than 77% of the Tray stores we check.