Identification
Its full user-agent string, exactly as it arrives at the gate:
Anthropic does not publish a way to verify Claude-User's traffic. Treat its user agent as a claim, not proof: anyone can send it.
How to block Claude-User
Add these two lines to the robots.txt file at the root of your site. Well-behaved crawlers read it before they crawl, so the change applies from Claude-User's next visit. Nothing else on your site needs to change.
# Block Claude-User from the whole site User-agent: Claude-User Disallow: /
Or let it visit but keep it away from part of the site:
# Let it in, but keep it out of one room User-agent: Claude-User Allow: / Disallow: /members/
Observed behaviour
Nothing on record in the last 30 days.
Requested 0 disallowed pages out of 0 requests. Never read robots.txt.
Has never followed the hidden link to /trap/. Either well trained or very lucky.
Where it comes from
The networks Claude-User's visits came from:
Nothing on record in the last 30 days.
Networks and countries come from the visitor's IP address, looked up in a local copy of the DB-IP database. The addresses themselves are never stored.
Questions site owners ask
Does Claude-User respect robots.txt?
We can't say yet. It has not fetched robots.txt here, and it has not touched a disallowed page either.
Will blocking Claude-User hurt my search rankings?
No. Claude-User isn't used by Google or Bing to rank pages. Blocking it only affects whether Anthropic collects your content.
How often does Claude-User visit?
Here, about 0 requests a day over the last week. Visits to your site depend on its size, how often it changes, and how many links point to it.