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meta-externalads
meta-externalads is a Meta crawler for use cases such as improving advertising and other business-related products and services.
Not tied to answers in an AI assistant.
- Meta-ExternalAgentTrainingNot checked
- Meta-WebIndexerSearchNot checked
- Meta-ExternalFetcherUser fetchNot checked
- meta-externaladsOtherNot checked
Reads your live robots.txt and applies the same rules these crawlers use. Nothing is stored.
- robots.txt token
meta-externalads- Follows robots.txt
- Yes, documented
- How to verify it
- Not published
- Seen on
- Not measured
- Last checked
- 17 September 2026
Should you block meta-externalads?
Blocking it limits Meta’s crawling for those advertising and business uses. Meta documents separate crawlers for link previews, AI, and user-requested fetches.
| Meta bot | Job | If you block it |
|---|---|---|
| Meta-ExternalAgent | Training | Blocking it opts your site out of this direct Meta AI crawling path, but does not cover every Meta user-triggered fetcher. |
| Meta-WebIndexer | Search | Allowing it can help Meta AI cite and link to your content; blocking it can reduce Meta AI search visibility. |
| Meta-ExternalFetcher | User fetch | A hit usually represents an on-demand fetch for a specific URL rather than broad crawling. |
| facebookexternalhit | Other | Blocking it can break rich link previews and Open Graph extraction in Meta surfaces. |
| meta-externaladsThis page | Other | Blocking it limits Meta’s crawling for those advertising and business uses. Meta documents separate crawlers for link previews, AI, and user-requested fetches. |
User-agent: meta-externalads
Disallow: /Asks meta-externalads not to crawl any page. Other Meta bots are unaffected. Add it to the robots.txt file at the root of your site, above any wider rules.
Also seen under Meta’s name, but not in its current documentation: FacebookBot. Rules naming them control no documented Meta crawler.
Spot it in your logs.
Match the name, then check where the request came from. Anyone can copy a user-agent.
meta-externalads/1.1 (+https://developers.facebook.com/docs/sharing/webmasters/web-crawlers)Version numbers change. Match the highlighted name, not the whole string.
meta-externalads/1.1Version numbers change. Match the highlighted name, not the whole string.
- 1
Match the name
Search your server or CDN log for
meta-externalads, case-insensitive. A match is a clue, not proof. - 2
Check the source
Meta publishes no IP ranges, reverse DNS or signatures for meta-externalads in the sources here, so it cannot be verified. Treat matches as unconfirmed.
Serve the content in HTML
The cited operator material does not verify JavaScript rendering. Serve useful HTML before client-side JavaScript where possible.
Meta says its crawlers may cache robots.txt for up to 24 hours, so changes can take that long to apply.
Questions, answered.
meta-externalads is a Meta crawler for use cases such as improving advertising and other business-related products and services.
Sources.
Officially documented. Operator facts and Trakkr’s measurements keep separate dates.
- [1]Meta crawler documentation
Officially documented · checked 17 September 2026
developers.facebook.com/docs/sharing/webmasters/web-crawlers
First verified 17 September 2026. Last source check 17 September 2026.
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