# Meta

Source: https://analytics.5h3ll.site/crawlers/facebookexternalhit

facebookexternalhit

## ABOUT THIS CRAWLER

Fetches pages shared on Facebook, Instagram or Messenger to build link previews.

**Usually means:** Someone shared your link. The crawler reads its title, description and thumbnail. It can bypass robots.txt for security checks.

## USER AGENT

facebookexternalhit

We match these as user-agent tokens, not full browser strings. Providers may add surrounding version or product text.

## IP VERIFICATION

This crawler is matched on its user agent only, because no machine-readable list of its IP addresses is available to us. Because user agents can be spoofed, it is shown as “claimed”, not verified.

## Discover when bots and AI assistants crawl your website.

Add a small server-side snippet to see which AI assistants, search engines and training crawlers request your pages, including pages that return 404.

Get started

Read the docs

- ChatGPT, Claude, Perplexity and Gemini traffic in one view
- Verified against each provider’s published IP ranges
- No visitor cookies and no crawler IP addresses stored