Who blocks AI · #720 in the Majestic Million
robots.txt · checked 9 Nov 2026
Does caniuse.com block AI crawlers?
We couldn’t check caniuse.com: its /robots.txt address answers with a web page rather than a robots.txt file.
GPTBotUnknownOAI-SearchBotUnknownClaudeBotUnknownPerplexityBotUnknownGoogle-ExtendedUnknownCCBotUnknown- robots.txt
- caniuse.com/?search=robots.txt · its /robots.txt address answers with a web page rather than a robots.txt file
- llms.txt
- not checked
- Checked
- 9 November 2026, as canaicrawl. We check again every week.
What do the bots actually get?
This page reads robots.txt, which states what caniuse.com asks of crawlers. A firewall or CDN can still refuse a bot that robots.txt allows. The live check requests the page as each bot and shows the status it gets.
Run a live check on caniuse.com Test a path in the robots.txt tester
History
- 19 October 2026: first checked, robots.txt couldn’t be read.