Meta-ExternalAgent vs ClaudeBot: Which AI Crawler Should You Allow or Block?
Complete side-by-side comparison of Meta-ExternalAgent (Meta) and ClaudeBot (Anthropic): user-agent strings, safety ratings, SEO impact, and copy-paste blocking rules. Updated August 2026.
Quick Verdict
Both Meta-ExternalAgent and ClaudeBot carry the same safety rating (Safe). Your decision should come down to whether you want your content used by Meta versus Anthropic, and whether each bot's purpose (training, search, or user requests) aligns with your content strategy.
| Attribute | Meta-ExternalAgent | ClaudeBot |
|---|---|---|
| Operator | Meta | Anthropic |
| User-agent string | meta-externalagent |
ClaudeBot |
| Category | AI & LLM Bots | AI & LLM Bots |
| Safety rating | Safe | Safe |
| SEO impact if blocked | Varies - Evaluate before blocking | Low - No SEO ranking impact |
| Recommendation | Generally safe to allow; provides legitimate crawling value. | Generally safe to allow; provides legitimate crawling value. |
| Official docs | Meta-ExternalAgent docs | ClaudeBot docs |
What is Meta-ExternalAgent?
A generic user-agent used by Meta for external fetching tasks.
Full Meta-ExternalAgent guideWhat is ClaudeBot?
The main crawler for Anthropic. It scrapes the web to build the training dataset for the Claude family of AI models.
Full ClaudeBot guideHow to block each bot
Block Meta-ExternalAgent in robots.txt
User-agent: meta-externalagent Disallow: /
Block ClaudeBot in robots.txt
User-agent: ClaudeBot Disallow: /
Want to block or allow many bots at once? Use our free robots.txt generator with 248+ bot presets, then verify with the AI crawler checker.
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