Real-time 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: /
See whether Meta-ExternalFetcher — and 39 other AI crawlers — can reach your site today.