Sites that block Meta-WebIndexer
237 of the 20,795 domains we have measured, 1%, disallow meta-webindexer at the site root in robots.txt. Meta-WebIndexer builds the index that decides whether the operator's assistant cites a page.
Every domain here has removed itself from Meta's answers. Blocking a retrieval agent withholds nothing from model training, because training uses a different token.
237 of 20,795 measured domains (1%) disallow meta-webindexer at the site root in robots.txt. Every domain named on this page was fetched directly and its robots.txt parsed against RFC 9309; none of it is inferred from a third-party index.
Measured 2026-08-23 by direct request to every domain in the corpus. Method: how this is measured. Reuse under CC BY 4.0 with attribution.
Cite as: Crawl Census, "Sites that block Meta-WebIndexer", measured 2026-08-23. https://crawlcensus.com/blocked/meta-webindexer
The list 237 domains
Rank is the domain's position in the popularity list used to seed the corpus; a dash means it was scanned on request rather than seeded. Score is the site's overall AI access score, which blocking depresses but does not by itself determine.
Check a specific domain
See also the Meta-WebIndexer reference, the full census, and the JSON endpoint.