Websites blocking meta-externalagent

Meta's crawler for collecting web data used to train its AI models, including the Llama family, and to improve Meta products.

Operated by Meta · Training crawler · operator documentation

5.20% block meta-externalagent 1.28 million of 24.68 million domains with a known robots.txt policy 1.82% block it by name 448K domains, the rest inherit a blanket * block 2.62% restrict it by name 646K domains name it and close some of its paths 4.97% name it in robots.txt 1.23 million domains give it rules of their own

Data for Oct 2026. All four percentages divide by the same 24.68 million domains. Blocked counts both explicit User-agent: meta-externalagent blocks and blanket * blocks the crawler inherits.

Blocking trend

Share of domains with a known robots.txt policy blocking meta-externalagent in each monthly crawl. The denominator moves with each crawl and is defined in the methodology.

Historical mentions, HTTP Archive

Share of sites in each month's HTTP Archive crawl whose robots.txt named meta-externalagent. This series counts mentions only (the archive keeps no rule text), comes from a different population than our own crawl above, and the two are never merged.

High-authority sites blocking meta-externalagent by name

Domain OPROpen Page Rank Blocking since
linkedin.com 9.82/10 Aug 2026
nytimes.com 9.28/10 Aug 2026
tumblr.com 9.27/10 Aug 2026
cnn.com 9.16/10 Oct 2026
amazon.co.jp 9.16/10 Sep 2026
substack.com 9.13/10 Oct 2026
amazon.de 9.13/10 Oct 2026
cookielaw.org 9.10/10 Aug 2026
usatoday.com 9.08/10 Sep 2026
mhlw.go.jp 9.08/10 Sep 2026
giphy.com 9.07/10 Oct 2026
wired.com 9.07/10 Oct 2026
bandcamp.com 9.06/10 Aug 2026
lnkd.in 9.05/10 Aug 2026
naver.com 8.99/10 Oct 2026
healthline.com 8.98/10 Aug 2026
ebay.com 8.95/10 Oct 2026
indiatimes.com 8.95/10 Aug 2026
coursera.org 8.94/10 Oct 2026
uol.com.br 8.92/10 Oct 2026
si.edu 8.92/10 Oct 2026
huffpost.com 8.91/10 Aug 2026
amazon.ca 8.91/10 Oct 2026
newyorker.com 8.90/10 Oct 2026
entrepreneur.com 8.89/10 Oct 2026
heise.de 8.88/10 Sep 2026
mashable.com 8.87/10 Sep 2026
francetvinfo.fr 8.87/10 Aug 2026
smh.com.au 8.86/10 Sep 2026
proofpoint.com 8.85/10 Sep 2026

Sites whose robots.txt names meta-externalagent (or a legacy alias) with a full block, ranked by Open Page Rank. Sites blocking every crawler with a blanket * rule are counted above but not listed here. Since dates start at our first observation of the rule.

Restricting some paths

Crawler first seen in the wild around Aug 2024. How to block it and what each state means is on the methodology page.

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