llms.txt Discovery Checker
Check whether a page links to its llms.txt from HTML metadata or a Link header.
A site can point agents at its llms.txt explicitly with a <link> element, a <meta> tag or an HTTP Link header, rather than relying on them to guess the conventional path. This check looks for that declaration. Not publishing one is fine — the file can simply be requested directly.
This is one of the checks the AI Agent Readiness Checker scores under Content, and it can also be run on its own for any URL.
Experimental · Based on: llms.txt (community specification) · RFC 8288 — Web Linking
About this validation
Experimental / emerging conventionChecks whether a page declares its llms.txt through a link relation rather than leaving an agent to guess the conventional path. The link mechanism is standardized; llms.txt itself is a community convention.
- Protocol / standard:
- Reference documentation:
- Rules reviewed:
- Nov 11, 2026
Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.