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Claude-User

Claude-User supports Claude AI users. When individuals ask questions to Claude, it may access websites using a Claude-User agent.
AnthropicClaude-User
AI AssistantUser Initiated

What is Claude-User?

Claude-User is Anthropic's AI assistant crawler. Claude-User supports Claude AI users. When individuals ask questions to Claude, it may access websites using a Claude-User agent.

Claude-User helps decide whether you show up in AI answers. It fetches and indexes pages so its assistant can cite them in responses, which means the content it can reach is the content that can be quoted, linked, and recommended to users. For generative engine optimization, keeping Claude-User allowed is important: block it and you effectively opt out of being cited on that AI surface.

Tracking which AI crawlers and agents reach your site, and what they do once there, is the foundation of generative engine optimization. See our guides to AI crawlers and robots.txt to control automated access and protect your AI search visibility.

Promptwatch tracks Claude-User in real time from your server and CDN logs, so you can see exactly when it visits, which pages it requests, and how those crawls relate to citations. Learn more in AI crawler logs.

Track Claude-User with Promptwatch

Promptwatch classifies Claude-User (Claude-User) in real time from your server and CDN logs. See exactly when it visits, which pages it requests, the status codes it gets, and how those crawls map to AI citations. Requests are validated against the operator's published IP ranges to filter out spoofed user agents.

How to handle Claude-User

Most sites keep Claude-User allowed, because blocking it can remove your pages from the AI answers and search results it powers. Only disallow it if you specifically want to opt out of that surface.

To control Claude-User, add a rule for its user agent to your robots.txt:

User-agent: Claude-User
Disallow: /

Because Claude-User performs user-initiated or real-time fetches, it may not always honor robots.txt, confirm its behavior by watching your access logs.

Examples

  • After publishing a new comparison page, a marketer checks whether Claude-User has fetched it so the content can appear in AI answers.
  • An SEO lead keeps Claude-User allowed in robots.txt to preserve visibility in AI-powered search.

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Frequently asked questions about Claude-User

Learn about AI visibility monitoring and how Promptwatch helps your brand succeed in AI search.

Claude-User is operated by Anthropic. It functions as Anthropic's AI assistant crawler.

Be the brand AI recommends

Monitor your brand's visibility across ChatGPT, Claude, Perplexity, and Gemini. Get actionable insights and create content that gets cited by AI search engines.

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