Agent Web Index › st.nu

Can AI assistants read st.nu?

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.

D49 / 100

0 of 6 crawlers can read this page.

More readable than 6% of the 47,294 sites measured so far. No JSON-LD.

What each crawler got back

Crawler	HTTP	Result	robots.txt
ClaudeBot (Claude)	451	error	blocked
GPTBot (ChatGPT)	451	error	blocked
OAI-SearchBot (ChatGPT Search)	451	error	blocked
PerplexityBot (Perplexity)	451	error	blocked
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	—	opted out in robots.txt	blocked
Meta-ExternalAgent (Meta AI)	200	allowed by the server, blocked in robots.txt	blocked
Amazonbot (Alexa, Rufus)	200	allowed by the server, blocked in robots.txt	blocked

Fastly answers for this domain. Where a crawler above is refused while robots.txt allows it, the rule is applied by that edge, not written by the site — see how often each edge does this.

The checks

Answers AI agents like it answers people43%
Readable without JavaScript100%
robots.txt lets the crawlers in0%
Facts in JSON-LD0%
Content reachable, not buried89%
Publishes a map of itself70%
Plain structure55%

Re-run this audit live → Full AI-visibility report for st.nu →

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Put the badge on st.nu — it links back here, and re-measures every time this index re-crawls.

<a href="https://shop.lumnika.com/ai-readiness/st.nu"><img src="https://shop.lumnika.com/ai-readiness/st.nu/badge.svg" alt="AI readability"></a>

Method. Six live HTTP requests 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, 47,294 domains measured, updated continuously.