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Claude-User
AI assistant (user-triggered)Claude fetching a page for the person in the conversation.
What Claude-User does
Claude-User appears when someone asks Claude about your site and it retrieves the page live. Like ChatGPT-User, each visit maps to a real human's question happening right now — high-intent traffic wearing an agent's user agent.
Fact sheet
- Operator
- Anthropic
- robots.txt token
- Claude-User
- Honors robots.txt
- Yes (documented)
- Executes JavaScript
- No — invisible to browser analytics
- Identity verifiable by IP
- No published ranges
- Official documentation
- Anthropic docs ↗
How it identifies itself
Mozilla/5.0 (compatible; Claude-User/1.0; [email protected])
User-agent strings are free to fake — any scraper can claim to be Claude-User. With no published IP ranges, claims by this agent can't be cryptographically verified — treat lookalikes with suspicion.
Allow or block via robots.txt
# Block Claude-User User-agent: Claude-User Disallow: / # Or allow it explicitly User-agent: Claude-User Allow: /
Should you block Claude-User?
Blocking it breaks live user requests about your business. Keep it open; measure it; make the pages it reads answer well.
Is Claude-User reading your site?
Claude-Usernever runs JavaScript, so GA4 can't see it. VisitorType's server-side detection can — with per-page counts.
Measure it free