AI TrainerMeta
Last verified: 2026-06-13 · maintained by Unsourced
Meta-ExternalAgent crawls to train and improve Meta's AI products, including Llama models and Meta AI. It honours robots.txt directives.
There is no published IP-range feed or documented reverse-DNS footprint for Meta-ExternalAgent, so its identity can't be verified by IP. Treat the User-Agent as an unverified claim.
A User-Agent string is just a claim — anyone can send Meta-ExternalAgent in a header. Confirm identity two ways:
forward-confirmed reverse DNS (the IP resolves to Meta, and that host resolves back to the IP), and, where published,
an IP inside the operator's official ranges. If neither holds, it's an impostor wearing the badge — not Meta-ExternalAgent.
Recommended: keep. Feeds model training; blocking it can quietly remove you from future AI answers.
If you do choose to act in robots.txt (which crawlers honour but don't enforce):
# Meta-ExternalAgent: recommended to ALLOW — blocking can cost you AI visibility User-agent: Meta-ExternalAgent Disallow:
Is Meta-ExternalAgent really from Meta?
Meta-ExternalAgent is Meta's crawler, but a User-Agent header can be spoofed, so the claim alone isn't proof. Confirm it with forward-confirmed reverse DNS and, where published, a match against Meta's official IP ranges.
What are Meta-ExternalAgent's IP ranges?
There's no published IP-range feed or documented reverse-DNS footprint for Meta-ExternalAgent, so it can't be verified by IP. Treat its User-Agent as an unverified claim.
Should I block Meta-ExternalAgent?
Our recommendation: keep. Feeds model training; blocking it can quietly remove you from future AI answers.
Unsourced verifies every AI crawler against published ranges and reverse DNS, and shows which AI assistants cite you.
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