What is CCBot?
CCBot is Common Crawl's AI training crawler. Builds a public web archive that many AI companies train models on. Blocking it quietly removes you from future models' knowledge.
What does CCBot do with your content?
Builds a public web archive that many AI companies train models on. Blocking it quietly removes you from future models' knowledge. Like most AI crawlers, CCBot reads your pages as plain HTML — it does not run JavaScript — so content that only appears after scripts execute is invisible to it.
Should you block CCBot?
CCBot feeds Common Crawl, a public archive many AI labs train on. Blocking it quietly removes you from the training data of future models — models that customers may ask for recommendations years from now. The trade-off is real: allow it for AI visibility, block it if keeping your content out of training data matters more to you.
How do you allow or block CCBot in robots.txt?
Add one of these snippets to the robots.txt file at the root of your site. The first explicitly allows CCBot everywhere; the second blocks it completely.
# Allow CCBot
User-agent: CCBot
Allow: /
# Block CCBot
User-agent: CCBot
Disallow: /Is robots.txt enough?
Not always. CDNs and firewalls (Cloudflare in particular) can block crawlers at the network level regardless of what robots.txt says — Cloudflare blocks AI crawlers by default for many accounts. If you want CCBot to reach your site, check your CDN's bot settings too. SeeGeo's free audit checks both.
How do I check whether CCBot can read my site right now?
Two checks, both needed: read your robots.txt for a group naming CCBot (or the * group it falls back to), then request your homepage with CCBot's user agent and confirm you get a 200 with your real HTML rather than a 403 or a challenge page. SeeGeo's free crawler check runs both in a few seconds.
How does CCBot compare to similar crawlers?
CCBot is one of 16 crawlers the SeeGeo audit checks individually. The closest comparisons:
| Crawler | Operator | Role | Runs JavaScript? |
|---|---|---|---|
| CCBot | Common Crawl | AI training crawler | No |
| GPTBot | OpenAI | AI training crawler | No |
| ClaudeBot | Anthropic | AI training crawler | No |
| Google-Extended | AI training crawler | No | |
| Bytespider | ByteDance | AI training crawler | No |
Why does crawler access matter? The numbers
Crawler access is where AI visibility starts or ends: a blocked crawler can't read you, and an AI that can't read you can't recommend you.
- Visitors arriving from AI assistants convert at roughly 4.4x the rate of traditional organic search on average (Semrush, cross-industry, 2026).
- AI-assistant referrals are still only about 1% of total web traffic — small, but the fastest-growing acquisition channel measured (multiple 2026 studies).
- Adobe Digital Insights (Q1 2026) measured AI-assistant visitors converting 42% better than non-AI traffic — a full reversal from the year before.
- Cloudflare blocks AI crawlers by default for many accounts, so sites are often invisible to AI without anyone having decided to be.
- Content edits alone — statistics, citations, quotable structure — can raise AI visibility on the order of 30–40% (Princeton GEO study, KDD 2024).
Frequently asked questions
What is CCBot?
CCBot is Common Crawl's AI training crawler. Builds a public web archive that many AI companies train models on. Blocking it quietly removes you from future models' knowledge.
Should I block CCBot?
CCBot feeds Common Crawl, a public archive many AI labs train on. Blocking it quietly removes you from the training data of future models — models that customers may ask for recommendations years from now.
Does CCBot run JavaScript?
No. CCBot, like most AI crawlers, reads raw HTML without executing JavaScript. If your content only renders client-side, it is effectively invisible to it.
Can CCBot read my website?
Only if two things are true: your robots.txt does not disallow CCBot, and your server or CDN actually serves the page when CCBot asks. Firewalls can block it regardless of robots.txt, so the reliable way to know is to fetch your homepage as CCBot — the free check on see-geo.com/ai-crawler-check does exactly that.