AI crawler · Common Crawl

CCBot

CCBot is Common Crawl's crawler. Collects pages to train models; blocking it does not affect whether AI can answer about you today.

By Reflexa Technologies — the team building Reflexa, the agent that works on your site · updated 16 October 2026

What CCBot is

CCBot is Common Crawl's crawler. Common Crawl is a non-profit that publishes a free copy of the web, and that copy has been the training corpus for many models, including early GPTs.

What it does with your pages

Training: collects pages to train models; blocking it does not affect whether AI can answer about you today.

How it identifies itself

User-agent string:

CCBot/2.0 (https://commoncrawl.org/faq/)

robots.txt token: CCBot. Documented: honours robots.txt.

How to verify it

Common Crawl publishes no IP-range feed for CCBot. Treat the user-agent as a claim, and rate-limit or block by behaviour if it misbehaves.

What blocking it means

Blocking CCBot keeps your pages out of the public crawl that many models train on. It has no effect on any live AI answer.

Vendor documentation

https://commoncrawl.org/ccbot

Check your site: the AI Crawler Access Check reads your robots.txt for CCBot and the other AI crawlers and fetches your homepage with each one's real user-agent — the CDN challenge that robots.txt cannot show.

Other crawlers

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Questions people ask.

Should I block CCBot?

Blocking CCBot keeps your pages out of the public crawl that many models train on. It has no effect on any live AI answer.

How do I allow CCBot in robots.txt?

Add a group for it: User-agent: CCBot on one line and Allow: / on the next. If a User-agent: * group has a Disallow, the named group takes precedence for CCBot.

How do I block CCBot?

User-agent: CCBot then Disallow: /. Common Crawl documents that CCBot honours robots.txt.

How do I verify a request is really CCBot?

Common Crawl publishes no IP-range feed for CCBot. Treat the user-agent as a claim, and rate-limit or block by behaviour if it misbehaves.

Is CCBot allowed on your site?

The free crawler check reads your robots.txt per bot and fetches your homepage with each one's real user-agent.

Check my site →