User-initiated fetch for Claude; disabling it may reduce visibility in user-directed search.
Safe to allow
Claude-User supports Claude users: when someone asks Claude a question, it may access a site with this agent. Anthropic states that disabling it prevents retrieval in response to a user query, which may reduce your site's visibility in user-directed web search.
It is not used to train models, and it is separate from Claude-SearchBot (indexing) and ClaudeBot (training).
User-agent: Claude-User Allow: /
User-agent: Claude-User Disallow: /
Anthropic states robots.txt may not apply to this user-triggered fetch, so a Disallow here is not a guarantee of blocked access.
Official source Operator documentation — last verified against operator docs 2026-09-12
"Should you block it?" below is our own interpretation, not the operator's recommendation.
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