Claude-User

User agent

Claude-User

MetricRaven matches this token anywhere in the request's user agent, ignoring case. Operators add version numbers and browser text around it, for example "Claude-User/1.0".

IP verification

Verified when the user agent and the IP range both match

1. 1User agent

   The request's user agent contains Claude-User.

2. 2Request IP

   Your server-side tracker sends the IP that made the request.

3. 3Range check

   The IP is compared with the ranges Anthropic publishes, refreshed twice a day.

Range sources

• Anthropic crawler IP ranges

  https://claude.com/crawling/bots.json

Control it in robots.txt

User-agent: Claude-User
Disallow: /private/

Fetchers that act for a person may not follow robots.txt; block them at your server or firewall if you need to.

Questions

What is Claude-User?

Fetches a page when Claude opens it to answer a person's question. MetricRaven groups it under AI answers: assistants opening a page because a person asked about it.

How do I verify that a request really comes from Claude-User?

Check both the user agent and the IP. Requests from Claude-User contain "Claude-User" in the user agent and come from the IP ranges Anthropic publishes (https://claude.com/crawling/bots.json). A request with the name but another IP is likely spoofed.

How do I block or allow Claude-User?

Add a robots.txt group for "Claude-User" with the paths to allow or disallow. Fetchers that act for a user may ignore robots.txt; block those at your server or firewall instead.

How can I see when Claude-User visits my website?

Most crawlers never run JavaScript, so browser analytics miss them. MetricRaven's @metricraven/ai-crawl package reports crawler requests from your server, verifies their IPs against published ranges, and shows which pages each crawler reads.