Free Tool
AI Crawler Access Checker
Many sites block AI crawlers by accident — which means ChatGPT, Claude, and Perplexity can never learn about them. Enter a URL to see who is allowed in, and whether you have an llms.txt.
Why would you block an AI crawler?
Some publishers block AI crawlers on purpose — to protect content from being used in training. But many small businesses block them by accident: a template robots.txt, a security plugin, or a "block bots" setting can quietly shut out GPTBot and Google-Extended. If you want to be recommended by AI tools, that is exactly the wrong outcome.
To allow them, add explicit User-agent / Allow rules to your robots.txt, and publish an llms.txt so AI tools have a clean summary to work from. It is a core part of AI visibility (AEO/GEO).
Curious how common this actually is? We checked robots.txt on 1,000 real websites — see the full study.