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Site-Score · mercadona.es
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Gibt es Substanz, die ein Agent lesen kann?
Homepage does not serve Markdown via content negotiation
Serve a Markdown representation of your pages when agents request "Accept: text/markdown". Agents like Claude Code and Cursor ask for it, and Markdown cuts token usage by roughly 80% against HTML. Cloudflare ("Markdown for Agents") and Vercel can enable this without code changes.
No <link rel="alternate" type="text/markdown"> fallback found on the homepage
If you cannot enable content negotiation, advertise a Markdown version with <link rel="alternate" type="text/markdown" href="/index.md"> so agents can discover it.
No JSON-LD structured data found
Add a <script type="application/ld+json"> block in your HTML <head> with schema.org structured data describing your site, organization, or person.
Sparse server-rendered content (1 words, 9 chars)
Render at least the main page content server-side. Many AI crawlers (GPTBot, ClaudeBot, CCBot) do not execute JavaScript and will see only the static HTML.
Low text-to-markup ratio (1.6%)
A very low text-to-markup ratio is a typical SPA-shell symptom. Inline more content directly into the HTML response.
Empty SPA mount point detected: #root
The static HTML contains an empty SPA mount node, which means content is rendered only client-side. Enable SSR/SSG so the initial HTML response includes meaningful content.
Semantic landmarks present (section, footer, nav)
No <h1> heading found
Add a single <h1> describing the page. Agents and search engines treat the H1 as the primary topic indicator.
<title> is too short (9 chars): "Mercadona"
Lengthen the title to 20-70 characters with a clear topic indicator.
Meta description length 122 chars
Canonical URL: https://www.mercadona.es/
<html lang="es">
UTF-8 charset declared
Viewport meta present: "width=device-width,initial-scale=1,shrink-to-fit=no"
Method note: this reads markup, not a rendered accessibility tree
Kann ein Agent die Seite überhaupt abrufen?
Response compressed with gzip
No ETag or Last-Modified header — conditional requests unsupported
Send an ETag or Last-Modified header so crawlers can revalidate with If-None-Match / If-Modified-Since and receive a cheap 304 Not Modified instead of the full body.
Homepage size is reasonable (2.2 KB decompressed)
Roughly 2 tokens of content in 556 tokens of response (100% markup)
An agent pays to receive the markup and then discards it. Serving Markdown on Accept negotiation is the direct fix.
Homepage responded in 254ms
A missing page redirects (302) instead of returning 404
A redirect on a nonexistent path hides the error. Return 404 or 410 so a client can tell the difference.
Homepage answers after 1 redirect
HEAD requests are supported
Character encoding declared in the document (not in the Content-Type header)
Site is served over HTTPS
HTTP requests redirect to HTTPS
HSTS max-age is short (86400s = ~1 days)
Use at least max-age=15768000 (~6 months); preload list submission requires max-age=31536000 (1 year).
HSTS does not include subdomains
Add includeSubDomains to apply HSTS across api., docs., etc. Required for preload list submission.
HSTS lacks the preload directive
Add preload (and ensure max-age >= 31536000 + includeSubDomains) and submit the domain at https://hstspreload.org for browser-built-in HTTPS enforcement.
All 10 core AI crawler user-agents receive the same page as a regular client
Homepage is indexable
notranslate declared — assistants should not offer a translated version
No directive restricts how AI assistants may use this page
Findet ein Agent, was Sie veröffentlichen?
Sitemap located: https://mercadona.es/sitemap.xml
Sitemap response does not look like XML
Serve the sitemap with valid XML and Content-Type: application/xml. Confirm the file starts with <?xml ...?> and contains <urlset> or <sitemapindex>.
No AI meta tags (ai:*) found
Add AI meta tags to your HTML <head>: <meta name="ai:summary" content="Brief description">, <meta name="ai:content_type" content="website">, <meta name="ai:author" content="Your Name">.
No rel="alternate" link to llms.txt in HTML
Add to your <head>: <link rel="alternate" type="text/plain" href="/llms.txt" title="LLM-optimized content">
No rel="alternate" link to the Agent Card in HTML
Add to your <head>: <link rel="alternate" type="application/json" href="/.well-known/agent-card.json" title="Agent Card">
No rel="me" identity links found
Add rel="me" links to verify your identity across platforms: <link rel="me" href="https://github.com/yourname">, <link rel="me" href="https://twitter.com/yourname">.
OpenGraph required tags missing: og:type
Add these meta tags: <meta property="og:type" content="...">.
Twitter Card required tags missing: twitter:title, twitter:description
Add these meta tags: <meta name="twitter:title" content="...">, <meta name="twitter:description" content="...">.
/robots.txt exists
No core AI crawlers explicitly configured
Add User-agent entries for core AI crawlers in your robots.txt. For each crawler, add: User-agent: <name> followed by Allow: / on the next line.
No Sitemap directive found
Add a Sitemap directive to your robots.txt: Sitemap: https://your-site.com/sitemap.xml
No Content-Signal directive found (optional)
Declare how crawlers may use your content after access with the Content Signals Policy, e.g.: Content-Signal: search=yes, ai-train=no. Known signals: search, ai-input, ai-train, plus the optional use=immediate|reference|full. Generate yours at contentsignals.org.
0/57 known AI crawlers have explicit rules
Add explicit User-agent entries for more AI crawlers to maximize discoverability.
/llms.txt exists
/llms.txt Content-Type is "text/html"
Configure your server to serve /llms.txt as text/plain so AI agents parse it correctly.
Missing H1 heading (first line should start with "# ")
Add an H1 heading as the first line of your llms.txt file, e.g.: # Your Site Name
No blockquote description found ("> ...")
Add a blockquote description after the H1 heading, e.g.: > A brief summary of your site for AI agents.
No section headings found (## ...)
Organize your llms.txt content with ## section headings (e.g., ## About, ## API, ## Documentation).
No Markdown links found
Add Markdown links to relevant pages: [Page Title](https://example.com/page). This helps AI agents navigate your site.
/llms-full.txt also available (bonus)
No rel="describedby" link to llms.txt
llms.txt v2 uses this relation so a page can name the file that covers it. Add <link rel="describedby" href="/llms.txt"> or the equivalent Link header, so an agent that landed on a deep page does not have to guess that an index exists.
No per-page Markdown mirror found
llms.txt v2 documents appending .md to a URL for its Markdown version. The index tells an agent which pages exist; the mirrors are what make reading them cheap.
Consumer note: llms.txt is read by coding agents, not by search
6/7 security headers present
No Link header for AI discovery (llms.txt, Agent Card)
Add a Link response header pointing to your AI discovery files: Link: </llms.txt>; rel="alternate"; type="text/plain", </.well-known/agent-card.json>; rel="alternate"; type="application/json"
No CORS headers on .well-known resources
Add Access-Control-Allow-Origin: * to responses from /.well-known/* so AI agents from other domains can fetch your discovery files.
No machine-readable discovery relations beyond llms.txt and the Agent Card
Advertise what you publish with Link relations so agents stop guessing paths. Add the ones that apply, for example: Link: </llms.txt>; rel="describedby", </.well-known/api-catalog>; rel="api-catalog". Informational in 3.x: this does not affect your score.
Was kann ein Agent aufrufen?
No agent resource catalog found
A catalog is one document listing everything an agent can call here — agent cards, MCP servers, APIs, skills — so a client stops probing four conventions to find out. Worth publishing once you have more than one of those. Informational: both ai-catalog.json and ard.json are still drafts, so this never affects your score.
No agent-facing surface — an Agent Card does not apply to this site
/.well-known/api-catalog served as "text/html"
Serve the catalog as application/linkset+json.
No API surface — API discovery does not apply to this site
No MCP server — MCP discovery does not apply to this site
No developer-facing surface — skills do not apply to this site
No commerce surface — agentic-commerce discovery does not apply to this site
Nothing on this site requires authorization — auth discovery does not apply
No forms and no WebMCP code — nothing here for an agent to invoke as a tool
Welche Nutzungsrechte sind erklärt?
No RSL license discovery found
Declare machine-readable licensing terms for your content with Really Simple Licensing. Add to robots.txt: License: https://your-site.com/license.xml — then publish the RSL document. See https://rslstandard.org.
No machine-readable usage policy declared
State your terms where they can be read without a lawyer. The lowest-effort option is a Content-Signal line in robots.txt: Content-Signal: search=yes, ai-input=yes, ai-train=no. Absence is neutral, not permission — but it also gives you nothing to point at.
/.well-known/security.txt exists
Required field "Contact" missing (RFC 9116)
Add "Contact:" to your security.txt. Use a mailto: or https: URI, e.g., Contact: mailto:security@example.com
Required field "Expires" missing (RFC 9116)
Add "Expires:" to your security.txt. Use an ISO 8601 date, e.g., Expires: 2026-12-31T23:59:59.000Z
No optional fields (Canonical, Preferred-Languages, Policy, etc.)
Consider adding Canonical: (canonical URL), Preferred-Languages: (e.g., en), and Policy: (link to your security policy).
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