Anthropic · Training crawler guide
ClaudeBot: who runs it and how to allow or block it
ClaudeBot collects public web content that may contribute to training Anthropic's generative AI models, to enhance their utility and safety.
ClaudeBot at a glance
- Operator
- Anthropic
- Purpose
- Training It collects content for AI model training.
- Kind
- Crawler. Visits your pages under its own user agent and reads the robots.txt group that names ClaudeBot.
- What it feeds
- Anthropic's Claude model training
- What Anthropic says about robots.txt
- Anthropic states that disallowing ClaudeBot signals that the site's future materials should be excluded from AI model training. Anthropic supports the Crawl-delay extension.
- User agent string
- Match it in robots.txt by its token, ClaudeBot. Agent tokens are compared without regard to case.
- Verified
- against Anthropic's official docs (opens in a new tab).
robots.txt lines
Allow or block ClaudeBot.
Paste one group into the robots.txt at the root of your domain. A group that names ClaudeBot replaces your * group for ClaudeBot, so copy any * Disallow lines you still want applied into it.
User-agent: ClaudeBot
Allow: /
User-agent: ClaudeBot
Disallow: /
# AI crawler access, generated by Suede AI Agent Studio
User-agent: OAI-SearchBot
Allow: /
User-agent: ChatGPT-User
Allow: /
User-agent: Claude-SearchBot
Allow: /
User-agent: Claude-User
Allow: /
User-agent: PerplexityBot
Allow: /
User-agent: Perplexity-User
Allow: /
User-agent: Amzn-SearchBot
Allow: /
User-agent: Amzn-User
Allow: /
User-agent: ClaudeBot
Disallow: /
Opens the crawlers behind live answers in ChatGPT, Claude and Perplexity while ClaudeBot stays out.
Precedence
How ClaudeBot reads your robots.txt
Major crawlers apply the robots.txt standard (RFC 9309) the same way. Three rules decide every path.
- A named group beats *. When a group says
User-agent: ClaudeBot, ClaudeBot follows that group and ignores the * group entirely. With no named group, the * group applies; with neither, every path is allowed. - The longest matching rule wins. Inside the group, the Allow or Disallow line with the longest matching path decides, so
Allow: /checkout/helpoverridesDisallow: /checkoutfor the help pages.*matches any run of characters and$marks the end of the path. - Allow wins a tie. When an Allow and a Disallow match with the same length, the path is allowed.
User-agent: *
Disallow: /
User-agent: ClaudeBot
Disallow: /checkout
Allow: /checkout/help
Disallow: /*.pdf$
| Path | Result | Deciding rule |
|---|---|---|
/ | Allowed | No rule in the ClaudeBot group matches, so it is allowed |
/checkout/cart | Blocked | line 5: Disallow: /checkout |
/checkout/help | Allowed | line 6: Allow: /checkout/help |
/menu.pdf | Blocked | line 7: Disallow: /*.pdf$ |
Line 2 still blocks every crawler without a group of its own. ClaudeBot reads only lines 4 to 7, which is why the homepage stays open to it.
Your site
See which line decides ClaudeBot on your site.
FAQ
ClaudeBot, answered.
What is ClaudeBot?
ClaudeBot collects public web content that may contribute to training Anthropic's generative AI models, to enhance their utility and safety. ClaudeBot is run by Anthropic and collects content for AI model training.
How do I allow ClaudeBot in robots.txt?
Add a group that names it: a line reading "User-agent: ClaudeBot" followed by "Allow: /". A group that names ClaudeBot replaces your * group for ClaudeBot, so repeat any Disallow lines from your * group that should still apply to it. To block it instead, use "Disallow: /" in that group.
Does blocking ClaudeBot remove me from AI answers?
Blocking ClaudeBot governs whether your content is used for Anthropic's Claude model training. Live answers come from answer bots such as Claude-SearchBot and Claude-User, which follow their own robots.txt groups, so you can block ClaudeBot and keep those open. Anthropic states that disallowing ClaudeBot signals that the site's future materials should be excluded from AI model training. Anthropic supports the Crawl-delay extension.
Related crawlers
Crawlers to set alongside it.
Every crawler, its operator and its docs are in the full AI crawler list.
Last updated .
Keep ClaudeBot where you want it. Every Monday.
Run the free check for the full crawler table and ranked fixes, unlock the $9.99 fix kit for paste-ready files, then let the AI Visibility Watch template read your robots.txt weekly and flag any answer bot that becomes blocked.