UCP conformance score, top priorities, impact & effort matrix, and copy-paste fixes for every issue.
Weak UCP signals — agent compatibility is at risk.
Agent Discovery is solid (85/100).
Serve profile as application/json: The profile URL did not return parseable JSON.
Serve profile as application/json → Publish a /llms.txt brand brief → Publish a sitemap.xml
The profile URL did not return parseable JSON.
No /llms.txt file detected at the root of your domain.
No sitemap.xml detected at the root of your domain.
Prioritised recommendations by expected impact and implementation effort
High impact, low effort
High impact, high effort
Medium impact & effort
Lower priority
All improvements ranked by priority, with evidence and actionable fixes.
The profile URL did not return parseable JSON.
Agents request /.well-known/ucp expecting JSON. HTML error pages, plain text, or YAML will all fail validation regardless of content.
Set the Content-Type header on the profile response and verify the body is valid JSON (no trailing commas, comments, or BOM).
Content-Type: application/json; charset=utf-8No /llms.txt file detected at the root of your domain.
llms.txt is an emerging convention (analogous to robots.txt) that lets you give AI agents a hand-written brief about your brand, product categories, return policy, and crawl preferences. Strict UCP agents do not require it, but recommendation/discovery agents increasingly read it for context.
Save as /llms.txt at your site root. Plain text, written for an LLM audience. The format is informal: these section headings are a working convention, not a spec. Replace the placeholders with your own brand details and update when policies or product lines change.
# llms.txt
# Public brief for AI agents about Yourstore
# About
One or two sentences on what you sell, who you sell to, and any defining context (founded, mission, sustainability stance, etc.).
# Product Categories
- Category one
- Category two
- Category three
# Policies
- Returns: e.g. 30 days, full refund
- Shipping: e.g. Free over $30, 3-5 business days
- Any other policy worth surfacing (cruelty-free, vegan, made-to-order, etc.)
# Agent Capabilities
- UCP manifest: /.well-known/ucp
- Supported flows: cart, checkout, tokenized payment, etc.
- Anything explicitly NOT supported (e.g. "no subscription products via agent")
# Contact
[email protected]No sitemap.xml detected at the root of your domain.
Sitemaps tell agents and crawlers which pages on your store are canonical and how often they change. Without one, agents fall back to following internal links, which is slower and less complete, especially for catalog pages buried behind faceted nav.
Most ecommerce platforms generate sitemap.xml automatically. If yours does not, generate one and serve it at /sitemap.xml.
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>https://yourstore.com/</loc>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://yourstore.com/products</loc>
<changefreq>daily</changefreq>
</url>
<!-- one <url> entry per indexable page -->
</urlset>OG tags missing or incomplete on your homepage.
OG tags give agents and link unfurlers (Slack, iMessage, ChatGPT) a clean title, description, and image to represent your store. Without them, shares show garbled fallback text.
Add inside <head>. og:title and og:type are the minimum; og:url, og:description, and og:image are strongly recommended.
<meta property="og:title" content="Yourstore | short tagline">
<meta property="og:type" content="website">
<meta property="og:url" content="https://yourstore.com/">
<meta property="og:description" content="One-sentence description of what you sell.">
<meta property="og:image" content="https://yourstore.com/og-cover.jpg">
<meta property="og:site_name" content="Yourstore">Every signal we evaluate, grouped by category.
Can AI agents find your store and its UCP profile?
Profile served over a secure connection.
Profile URL uses https://
Agents reject non-HTTPS endpoints outright. Signed payloads over HTTP are meaningless because the channel itself is tamperable.
Profile fetched OK from /.well-known/ucp.
HTTP 200
Agents start every session by fetching this URL. If it 404s or times out, the store is invisible to agent commerce.
robots.txt allows agent crawlers to fetch the profile.
robots.txt allows /.well-known/ucp
Agents respect robots.txt. Even a published profile gets ignored if the file is disallowed for known agent user-agents.
Hand-written brief at /llms.txt for AI agents.
HTTP 200 at /llms.txt
Emerging convention (analogous to robots.txt). Recommendation/discovery agents read it for brand context, return policy, and crawl preferences.
XML sitemap published at /sitemap.xml.
HTTP 200 at /sitemap.xml
Tells agents which pages are canonical and how often they change. Without it, agents fall back to following internal links.
OG meta tags on the homepage.
Missing or incomplete on homepage
OG tags drive how your store unfurls in agent surfaces, Slack, iMessage, and ChatGPT shares.
Schema.org Organization (or OnlineStore) JSON-LD on homepage.
Organization-typed JSON-LD detected
Gives agents a structured representation of your brand identity — used to verify you are who your profile claims you are.
Viewport meta tag for mobile rendering.
<meta name="viewport"> present
Mobile agent sessions render in browser sandboxes that respect this. Without it, screenshots taken by agents are unreadable.
Does your profile meet the published spec?
Profile structure conforms to the published UCP spec.
Response is not a valid JSON object
Strict UCP agents reject profiles with structural errors. The error code in the diagnostic shows which field failed.
ucp.version follows YYYY-MM-DD format.
No version declared
UCP versions are dates, not semver. Agents pick the closest matching schema based on this string.
Root-level keys array (canonical since 2026-07-12; legacy signing_keys also accepted) for response verification.
signing_keys present
Required for tokenized payment flows in v2026-04-08+. Stores using checkout-link redirects (e.g. WooCommerce native) often skip this safely.
Profile passes structural and field-level rules.
No outstanding validation issues
Each warning is a strict-spec deviation — the recommendations section above lists them with copy-code fixes.
What operations can agents actually perform?
Number of agent-readable capabilities under ucp.capabilities.
0 of 6 capability families detected. A family counts once however many namespaces or extensions declare it.
Capabilities tell agents what operations to attempt. More coverage = more sessions complete end-to-end without falling back to scraping.
Store declares a checkout-namespaced capability.
No checkout capability
Without a checkout capability, agents can browse but can't complete a purchase end-to-end.
Service transports (REST/MCP/A2A/Embedded) declared on services.
No transports declared
Transports tell agents how to actually call your endpoints. MCP and REST are the most widely supported today.
Tokenized payment handlers registered for in-conversation checkout.
No handlers declared
Tokenized payment lets agents complete purchases without redirecting the buyer to a hosted checkout. Empty by design is valid for WooCommerce-style native checkouts.
| UCP Status | Invalid |
| Endpoint | https://humanic.at/.well-known/ucp |
| HTTP Status | 200 |
| UCP Version | — |
| Transports | — |
| Last Observed | |
| Last Full Index |
Drop the live grade into your README, status page, or marketing site. The badge auto-updates as your score changes.
Live preview[](https://ucpchecker.com/score/humanic.at)<a href="https://ucpchecker.com/score/humanic.at"><img src="https://ucpchecker.com/score/humanic.at/badge.svg" alt="UCP Score for humanic.at"></a>This score reflects data from the most recent crawl. Run a fresh check to update, or read the methodology to see how each signal is scored.
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