Quillly All crawlers
facebookexternalhit
Operated by Meta · Other AI bots
Generates shared-link previews on Facebook.
User-agent token
facebookexternalhitrobots.txt
robots.txt compliance not documented
Allow or block facebookexternalhit
By default every well-behaved crawler is allowed. To block facebookexternalhit specifically, add this to your robots.txt:
User-agent: facebookexternalhit Disallow: /
Did facebookexternalhit read your content?
Quillly detects facebookexternalhit and every other crawler server-side when they fetch your published pages, and shows it in your analytics — so you can see exactly which AI picked up which post, and when.
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