AI crawlers · Training crawlers
ICC-Crawler
ICC-Crawler is the training crawler run by NICT: NICT ICC. Its operator publishes no IP ranges or DNS names for it, so a request carrying this name cannot be verified. Treat the name in a log line as a claim.
| User-agent token | ICC-Crawler |
| Operator | NICT |
| What it does | NICT ICC |
| Kind | training crawler |
| Can a request be verified? | No — user agent string only |
| In a CrawlCheck scan | Read from robots.txt; reported, never scored |
Allow or block it in robots.txt
User-agent: ICC-Crawler Disallow: /
User-agent: ICC-Crawler Allow: /
Add a group that names it: "User-agent: ICC-Crawler" followed by "Disallow: /". A crawler follows only the most specific group that names it, so once a group names ICC-Crawler, rules under "User-agent: *" no longer apply to it; repeat in that group any Disallow lines you still want.
What blocking it changes
No. It collects pages for training. Refusing it is a policy choice about training, separate from whether answer engines can reach, read and quote the site.
See what ICC-Crawler and every other named agent receive from your own site: run a free scan. The full catalogue is on AI crawlers and as JSON at /ai-crawlers.json.