Agent Web Index › udl.cat
Can AI assistants read udl.cat?
Measured on 2026-09-19 by asking the site 7 times — once as a browser, once as each of the 6 crawlers that feed ChatGPT, Claude, Perplexity, Gemini, Meta AI, Apple Intelligence and Doubao — and comparing what came back. The AI-training opt-out tokens that never crawl are read from robots.txt instead.
C62 / 100
5 of 6 crawlers can read this page.
More readable than 21% of the 47,315 sites measured so far.
No JSON-LD.
What each crawler got back
| Crawler | HTTP | Result | robots.txt |
|---|---|---|---|
| ClaudeBot (Claude) | 200 | can read it | allowed-by-star |
| GPTBot (ChatGPT) | 200 | allowed by the server, blocked in robots.txt | blocked |
| OAI-SearchBot (ChatGPT Search) | 200 | can read it | allowed-by-star |
| PerplexityBot (Perplexity) | 200 | can read it | allowed-by-star |
| Google-Extended (Gemini, AI Overviews) a robots.txt token, not a crawler: it controls how already-crawled pages may be used, and never makes a request of its own | — | not opted out | allowed-by-star |
| Meta-ExternalAgent (Meta AI) | 200 | can read it | allowed-by-star |
| Amazonbot (Alexa, Rufus) | 200 | can read it | allowed-by-star |
What to change, in order
- Declare the facts in JSON-LDThere is no JSON-LD on the page, so every fact — who you are, what you sell, the price — has to be guessed out of the prose and the layout. A schema.org block is the difference between being quoted correctly and being paraphrased.
- Publish sitemap.xml and llms.txtsitemap.xml and llms.txt are missing, so an assistant has to discover the site by following links. llms.txt is the emerging convention for telling an assistant which pages actually matter.
- Mark the content with <main>The content-reachability check scores 0/100: with no <main> or <article> landmark, or with most of the page outside it, an assistant reads the navigation and the footer at the same cost as the text it came for.
- 1 crawler is named and refused in robots.txt — a deliberate choiceGPTBot is blocked by a rule that names it. Nothing to fix here: this page records what is true, not what should be. It is listed so the deliberate part of the block is not confused with the accidental part above.
The checks
- Answers AI agents like it answers people100%
- Readable without JavaScript100%
- robots.txt lets the crawlers in86%
- Facts in JSON-LD0%
- Content reachable, not buried0%
- Publishes a map of itself0%
- Plain structure89%
Sites with a similar score
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<a href="https://shop.lumnika.com/ai-readiness/udl.cat"><img src="https://shop.lumnika.com/ai-readiness/udl.cat/badge.svg" alt="AI readability"></a>
Method. 7 live HTTP requests (one per crawler, one as a browser) plus robots.txt, llms.txt, sitemap.xml and security.txt, 12-second timeout each,
from a single vantage point. Blocking AI crawlers is a legitimate choice, not a failure: this page records what is true, not what should be.
Domain comes from a shop-platform seed (Shopify/WooCommerce/Magento/BigCommerce/Shopline fingerprint or JSON-LD price), not the Tranco traffic ranking. One page per domain — the homepage — is audited.
Part of the Agent Web Index, 47,315 domains measured, updated continuously.
Part of the Agent Web Index, 47,315 domains measured, updated continuously.