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UCP Score

UCP Score for levne-pletivo.cz

Ready for UCP agents

88 out of 100, grade A: ready for UCP agents. The missing 12 points are spread across Discovery and Conformance and Capabilities. 2 spec breaks on the status page aren't counted in the score.

Discovery 95Conformance 88Capabilities 81release 2026-08-25

UCP Score 88/100 grade A · ready for UCP agents
Points missing 12 Discovery, Conformance, Capabilities Fixes 2 raise the score 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).
95−1.5 pts
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.
81−5.7 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
1Publish the public keys agents use to check your messages
Your UCP profile lists no public keys, so an agent cannot confirm that a message really came from your store.
Agents use these keys to check that checkout messages really came from you. A store that takes payment through the agent needs them. A store that sends the buyer to its own checkout page can manage without them for now.
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.

+2
2Publish Organization schema (JSON-LD) on the homepage
No Organization-typed JSON-LD detected on your homepage.
Organization schema gives agents a structured representation of your brand identity: name, logo, social profiles, contact info, founding date. Agents use this to verify you are who you claim to be and to link your profile data to a recognizable entity.
Discovery · effort medium 
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "OnlineStore",
  "name": "Yourstore",
  "url": "https://yourstore.com",
  "logo": "https://yourstore.com/logo.png",
  "sameAs": [
    "https://twitter.com/yourstore",
    "https://www.instagram.com/yourstore"
  ],
  "contactPoint": {
    "@type": "ContactPoint",
    "telephone": "+1-800-000-0000",
    "contactType": "Customer Service"
  }
}
</script>

Drop into <head> or end of <body>. Use OnlineStore (more specific) when the entire site is an ecommerce store; Organization is the generic fallback.

Every check

12 passed · 4 to fix
Agent Discovery · 7 of 8
7 OK
HTTPS, UCP profile reachable, AI bot access, llms.txt, sitemap.xml, Open Graph tags, 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
  • Mobile viewport meta · <meta name="viewport"> present
Problem
Organization schema (JSON-LD)
Missing or incomplete on homepage. Fix 2 above.
Discovery
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 · 3 of 4
3 OK
Capabilities declared, Checkout capability, Transports declaredShow
  • Capabilities declared · 3 of 6 capability families detected: Checkout, Cart Management, Catalog. A family counts once however many namespaces or extensions declare it.
  • Checkout capability · dev.ucp.shopping.checkout detected
  • Transports declared · REST
To fix
Payment handlers
Empty array: checkout-link redirect strategy.
Capabilities

Not in the score, but worth fixing first

spec breaks
Problem
The profile sits behind a redirect
levne-pletivo.cz/.well-known/ucp answers 301 redirect. The spec forbids redirects on the profile, so an agent that asks levne-pletivo.cz stops there. Serve it directly on every host agents use.
on the status page
To fix
The profile has no ETag or Last-Modified header
Spec level: SHOULD. Not part of the UCP Score.
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 Shoptet stores
The profile answered in 633 ms, faster than 98% of the Shoptet stores we check.