Websites blocking Claude-User
The user-agent Claude uses when it fetches a page at a user's direct request, for example when a user asks Claude about a specific link.
Operated by Anthropic · User-request fetcher · operator documentation
3.54%
block Claude-User
881K of 24.91 million domains with a known robots.txt policy
0.07%
block it by name
16,405 domains, the rest inherit a blanket
* block
0.22%
restrict it by name
55,444 domains name it and close some of its paths
0.52%
name it in robots.txt
130K domains give it rules of their own
Data for Aug 2026. All four percentages
divide by the same 24.91 million domains. Blocked counts both
explicit User-agent: Claude-User blocks and blanket
* blocks the crawler inherits.
Historical mentions, HTTP Archive
0.2%
0.4%
0.6%
Apr 2025
Aug 2025
Dec 2025
Mar 2026
Jul 2026
Share of sites in each month's
HTTP Archive crawl whose robots.txt named
Claude-User. 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 Claude-User by name
| Domain | OPROpen Page Rank | Blocking since |
|---|---|---|
| linkedin.com | 9.82/10 | Aug 2026 |
| nytimes.com | 9.28/10 | Aug 2026 |
| usatoday.com | 9.08/10 | Aug 2026 |
| lnkd.in | 9.05/10 | Aug 2026 |
| congress.gov | 9.05/10 | Aug 2026 |
| msn.com | 9.04/10 | Aug 2026 |
| theatlantic.com | 9.01/10 | Aug 2026 |
| investopedia.com | 9.01/10 | Aug 2026 |
| lefigaro.fr | 8.95/10 | Aug 2026 |
| quora.com | 8.92/10 | Aug 2026 |
| huffpost.com | 8.91/10 | Aug 2026 |
| newyorker.com | 8.90/10 | Aug 2026 |
| mashable.com | 8.87/10 | Aug 2026 |
| francetvinfo.fr | 8.87/10 | Aug 2026 |
| arstechnica.com | 8.84/10 | Aug 2026 |
| wikihow.com | 8.81/10 | Aug 2026 |
| pcmag.com | 8.80/10 | Aug 2026 |
| amazon.it | 8.78/10 | Aug 2026 |
| rfi.fr | 8.73/10 | Aug 2026 |
| verywellmind.com | 8.72/10 | Aug 2026 |
| metro.co.uk | 8.72/10 | Aug 2026 |
| people.com | 8.70/10 | Aug 2026 |
| sfgate.com | 8.70/10 | Aug 2026 |
| france24.com | 8.68/10 | Aug 2026 |
| nikkeibp.co.jp | 8.68/10 | Aug 2026 |
| launchpad.net | 8.63/10 | Aug 2026 |
| fedoraproject.org | 8.62/10 | Aug 2026 |
| adage.com | 8.62/10 | Aug 2026 |
| verywellhealth.com | 8.59/10 | Aug 2026 |
| thespruce.com | 8.58/10 | Aug 2026 |
Sites whose robots.txt names Claude-User (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.