anthropic-ai
anthropic-ai is a bot operated by Anthropic that collects pages used to train AI models. Scrapes data to train LLMs and AI products offered by Anthropic. Whether it honours robots.txt is undocumented, and a request claiming to be anthropic-ai can be checked against a published IP range file.
anthropic-ai at a glance
| User agent | anthropic-aiToken only. The operator has not published a full user-agent string, so match on the substring rather than an exact header. |
|---|---|
| Operator | Anthropic |
| Purpose | Scrapes data to train Anthropic's AI products. |
| Respects robots.txt | Not documented |
| Verification method | Published IP range file An older token widely copied into robots.txt files. Anthropic now identifies its crawlers as ClaudeBot, Claude-User and Claude-SearchBot, so keep this rule but do not rely on it alone. https://claude.com/crawling/bots.json |
| Crawl pattern | Not published |
| Robots.txt tokens | anthropic-ai |
| Operator documentation | https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler |
Scrapes data to train LLMs and AI products offered by Anthropic.
Allow or block anthropic-ai
Paste one of these into the robots.txt file at the root of your domain. Rules are per token, so a block on one crawler leaves every other bot untouched.
User-agent: anthropic-ai
Disallow: /Blocks every path for this crawler only.
User-agent: anthropic-ai
Allow: /Explicit allow. Useful when a wildcard rule above it would otherwise catch this crawler.
User-agent: anthropic-ai
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /searchEdit the Disallow paths to match your own account, checkout and search URLs.
What blocking actually costs you
Blocking anthropic-ai keeps your pages out of the next training run. It does not remove anything already collected, and it has no effect on how the site ranks in ordinary search.
Block every crawler in the directory at onceIs that really anthropic-ai?
A user-agent header is a string the client chooses. Scrapers copy anthropic-ai precisely because site owners allow it. An older token widely copied into robots.txt files. Anthropic now identifies its crawlers as ClaudeBot, Claude-User and Claude-SearchBot, so keep this rule but do not rely on it alone.
Paste the IP address from your access log below. You will see whether it belongs to a hosting provider, a residential proxy pool or a Tor exit, plus the ASN that announces it, which is what tells you whether the claim holds up.
Other crawlers run by Anthropic
Related crawlers
Identify crawlers automatically instead of by hand
Agentscan checks a request against published crawler ranges, reverse DNS and hosting data, then returns a verdict your edge can act on. One call per request, no range files to keep up to date.