What is anthropic-ai? How to allow or block anthropic-ai in robots.txt. Part of the ACR registry. Free-check your site against all 241 crawlers.

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AI & LLM · ACR registry

anthropic-ai — robots.txt guide

Legacy Anthropic crawler user-agent.

robots.txt User-agent
anthropic-ai
Company
Anthropic
Official documentation
https://www.anthropic.com/claude-bot

How to allow anthropic-ai in robots.txt

Add an explicit allow rule (recommended when you use specific bot blocks elsewhere):

User-agent: anthropic-ai
Allow: /

How to block anthropic-ai in robots.txt

Block this crawler from your entire site:

User-agent: anthropic-ai
Disallow: /

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Don't guess — run the free AI Bot Checker against all 241 ACR crawlers including anthropic-ai.

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