Does ClaudeBot respect robots.txt?

Yes. The operator documents that ClaudeBot reads robots.txt and follows Disallow rules for its own token. Rules take effect on the next fetch of the file, which can be hours or days after you publish them.

How do I block ClaudeBot?

Add the ClaudeBot token to robots.txt with Disallow: /. If the crawler ignores robots.txt, match the user agent at your CDN or reverse proxy and return 403 there instead.

IPScanner

Training crawlers

ClaudeBot

ClaudeBot 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. It honours robots.txt, and a request claiming to be ClaudeBot can be checked against a published IP range file.

ClaudeBot at a glance

Reference data for the ClaudeBot crawler
User agent	`Mozilla/5.0 (compatible; ClaudeBot/1.0; [email protected])`
Operator	Anthropic
Purpose	Scrapes data to train Anthropic's AI products.
Respects robots.txt	Yes, documentedsource
Verification method	Published IP range file Anthropic publishes a single prefix file covering ClaudeBot, Claude-User and Claude-SearchBot. A request claiming to be ClaudeBot from outside those prefixes is a forgery. https://claude.com/crawling/bots.json
Crawl pattern	Not published
Robots.txt tokens	`ClaudeBot`
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.

robots.txt

Allow or block ClaudeBot

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.

Block ClaudeBot

User-agent: ClaudeBot
Disallow: /

Blocks every path for this crawler only.

Allow ClaudeBot

User-agent: ClaudeBot
Allow: /

Explicit allow. Useful when a wildcard rule above it would otherwise catch this crawler.

Allow, except the pages you never want quoted

User-agent: ClaudeBot
Allow: /
Disallow: /account/
Disallow: /checkout/
Disallow: /search

Edit the Disallow paths to match your own account, checkout and search URLs.

What blocking actually costs you

Blocking ClaudeBot 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 once

Verification

Is that really ClaudeBot?

A user-agent header is a string the client chooses. Scrapers copy ClaudeBot precisely because site owners allow it. Anthropic publishes a single prefix file covering ClaudeBot, Claude-User and Claude-SearchBot. A request claiming to be ClaudeBot from outside those prefixes is a forgery.

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.

Datacenter IP detectionNearly every real AI crawler egresses from cloud ranges. A residential IP claiming to be one is the first thing to check.IP reputation checkSee whether the address behind a fake crawler hit has a history of abuse elsewhere.Residential proxy detectionScrapers that get blocked by user agent often come back through residential proxy pools.

Other crawlers run by Anthropic

anthropic-aiTraining crawlers Claude-CodeCoding agents Claude-SearchBotAI search crawlers Claude-UserAssistant fetchers Claude-WebAutonomous agents

Related crawlers

anthropic-aiAnthropic · Training crawlers Claude-CodeAnthropic · Coding agents Claude-SearchBotAnthropic · AI search crawlers Applebot-ExtendedApple · Training crawlers FacebookBotMeta/Facebook · Training crawlers

Agentscan

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.

How Agentscan works API reference Pricing What is my IP

FAQ