ClaudeBot is a bot in the AI crawlers category, operated by Anthropic.
ClaudeBot helps enhance the utility and safety of generative AI models by collecting web content that could potentially contribute to their training.
AI crawlers collect web pages in bulk to build training data for large language models and other AI systems. They take content without sending visitors back. Most publishers block them in robots.txt or at the WAF unless they have a licensing deal with the operator.
Sample user agent strings sent by ClaudeBot:
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; ClaudeBot/1.0; [email protected])ClaudeBot/1.0 (+https://anthropic.com/claudebot)Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
Share of ClaudeBot requests to sites protected by Transfon Security in the 7 days to 27 October 2026.
| United States | 99% |
| Amazon.com, Inc. AS16509 | 97% |
| Google LLC AS396982 | 3% |
ClaudeBot follows robots.txt, so these rules stop it crawling the paths you choose. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: ClaudeBot Disallow: /
User-agent: ClaudeBot Disallow: /private/ Disallow: /search
User-agent: ClaudeBot Allow: /blog/ Disallow: /
User-agent: ClaudeBot Allow: / User-agent: * Disallow: /
User-agent: ClaudeBot group, ClaudeBot ignores your User-agent: * rules, so repeat any that should still apply.ClaudeBot from ClaudeBot's user agent; check Anthropic's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
ClaudeBot takes articles for AI training without sending readers back, and its page loads count as invalid traffic if your ad tags fire. Decide whether to license, limit or block it, and keep it out of ad requests.
Transfon Security for publishersVisits from ClaudeBot to your landing pages are not people. Keep them out of conversion, retargeting and audience data so you do not pay to reach a crawler.
Transfon Security for advertisersClaudeBot can copy product descriptions, prices and reviews in bulk. Allow it on pages you want AI models to know about and block it on search, cart and account pages.
Transfon Security for e-commerceClaudeBot can fetch documentation and public app pages at scale. Rate limit it so it does not slow the product for paying users.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows ClaudeBot by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
ClaudeBot is a bot in the AI crawlers category, operated by Anthropic. ClaudeBot helps enhance the utility and safety of generative AI models by collecting web content that could potentially contribute to their training.
Yes. ClaudeBot follows robots.txt, so a Disallow rule for the ClaudeBot user agent stops it from crawling the paths you list.
Add "User-agent: ClaudeBot" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "ClaudeBot" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so ClaudeBot may not follow it, and anyone can send ClaudeBot's user agent, so a fake ClaudeBot ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
AI crawlers collect web pages in bulk to build training data for large language models and other AI systems. They take content without sending visitors back. Most publishers block them in robots.txt or at the WAF unless they have a licensing deal with the operator.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
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