User-initiated fetch when Meta AI users open links.
Safe to allow
Meta-ExternalFetcher fetches a page in real time when a Meta user opens a link to your site inside a conversation. Blocking it breaks that click-through experience (users hit an error), but it does not affect indexing, citations or training.
User-agent: Meta-ExternalFetcher Allow: /
User-agent: Meta-ExternalFetcher Disallow: /
Meta states robots.txt may not apply to this user-triggered fetch, so a Disallow here is not a guarantee of blocked access.
Community source Community-maintained list — last reviewed 2026-09-12
https://github.com/ai-robots-txt/ai.robots.txt
We have not verified this entry against the operator's own documentation. Treat the description as indicative, and check the operator's site before relying on it.
"Should you block it?" below is our own interpretation, not the operator's recommendation.
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