meta-externalagent

If you block it

Your content is not collected for training Meta’s models.

What Meta says it is for

Meta’s page describes this one as crawling to train foundation AI models, or to index content directly to improve products.

Published details

robots.txt

Operator publishes no documentation

robots.txt caching

Meta says changes take up to 24 hours to take effect, because its crawlers use a cached copy.

User agent

Not published as a full string. Meta publishes only the token.Match on the prefix meta-externalagent rather than the whole string: operators version these, and an exact match stops working on the next release.

Verification

No published method.

Not addressed in the documentation

• As of 2026年10月12日, Meta’s documentation does not address whether it respects robots.txt — the page neither states it nor lists this one among its exceptions.