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Build

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BlogProduct deep-dives, comparisons and analytics craft GlossaryEvery analytics and AEO term, defined properly Bot directoryWho every crawler is and what it is fetching AI citation dataWhich sources each AI engine cites, updated nightly Free AEO reportAudit your visibility across AI answer engines Free toolsAI crawler access, llms.txt, citation preview, bot verifier

Company

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meta-externalfetcher

by Meta

AI answers AI UA + IP range

Fetches a page when a user asks an assistant to answer with fresh web context.

Meta fetcher used when a person requests or shares a specific URL.

What it usually means

A person asked an AI assistant a question, and the assistant fetched this URL to answer with fresh context or citations.

How to identify it

User-Agent tokens

meta-externalfetcher

robots.txt stanza

User-agent: meta-externalfetcher

Free tools

Verify a meta-externalfetcher request Check if your site allows meta-externalfetcher

How it's verified

Published IP-range endpoints

https://stat.ripe.net/data/announced-prefixes/data.json?resource=AS32934

Currently loaded ranges (sample) Refreshed Oct 19, 2026

57.144.236.0/232a03:2880:f33a::/48163.77.137.0/24163.77.160.0/242a03:2880:f346::/482a03:2880:f065::/482a03:2880:f221::/4869.171.224.0/192a03:2880:f26a::/4857.144.152.0/23

1 IP source configured

Meta's page for meta-externalfetcher

Sources

Meta crawler docs

More from Meta

facebookexternalhit

facebookexternalhit is an AI-related crawler operated by Meta.

meta-externalagent

Meta crawler collecting public content to train its AI models and improve Meta products.

meta-externalads

meta-externalads is an AI-related crawler operated by Meta.

meta-webindexer

Meta crawler used to improve Meta AI search result quality.

FacebookBot is an AI-related crawler operated by Meta.

Similar bots

User-triggered Amazon fetches for fresh answers in products such as Alexa.

User-triggered fetches when ChatGPT opens a page to answer a person.

User-triggered fetches when Claude opens a page to answer a person.

User-triggered Microsoft Copilot fetches for AI answers.

See if meta-externalfetcher has visited your site

Kitbase verifies and tracks bot and AI crawler traffic separately from human visitors, so you know exactly who's hitting your site.

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