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Agent directory · AI training crawler

ClaudeBot

Anthropic's crawler for collecting public web content that may be used to train its models.

Run by
Anthropic
Type
AI training crawler
Robots.txt name
ClaudeBot
Verifiable
No

What ClaudeBot does

Anthropic's crawler for collecting public web content that may be used to train its models.

As an AI training crawler, it collects public pages that may be used to train AI models. The kinds of AI agent that visit websites.

Should you allow it?

A real business choice. Lean towards blocking if your content is the product (publishing, research, courses); lean towards allowing if your pages exist to sell something else. A decision guide for blocking or allowing AI crawlers.

How to allow or block ClaudeBot

ClaudeBot reads the ClaudeBot group in your robots.txt. To block it everywhere:

User-agent: ClaudeBot
Disallow: /

To allow it everywhere, even if another rule blocks other bots:

User-agent: ClaudeBot
Allow: /

Robots.txt is a request, not a lock: well-behaved crawlers follow it, impostors don't. Robots.txt for AI agents.

How it identifies itself

A typical user agent:

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

How to tell if it's really ClaudeBot

Anthropic doesn't publish IP ranges or a reverse DNS domain for ClaudeBot, so a request can't be proven to come from it. Anyone can send its user agent, so treat the name alone as a claim, not proof. Ghost Agent Lab reports these requests as unverified rather than guessing.

Every Anthropic agent, and a robots.txt for all of them →

Does ClaudeBot visit your site? Ghost Agent Lab reads your CDN or server logs and shows every request from ClaudeBot and 1,566+ other known agents: what they read, what your site sent back, and whether each request was genuine. See agent traffic, or check whether AI agents can use your site for free.