{
 "slug": "ccbot",
 "name": "CCBot",
 "operator": "Common Crawl",
 "operator_slug": "commoncrawl",
 "category": "dataset",
 "category_label": "Corpus and dataset builders",
 "robots_token": "CCBot",
 "user_agent_substring": "CCBot",
 "user_agent_example": "CCBot/2.0 (https://commoncrawl.org/faq/)",
 "respects_robots_txt": "documented",
 "respects_robots_txt_label": "obeys robots.txt (documented)",
 "verification_method": "published-ranges",
 "verification_label": "published IP ranges",
 "published_ip_ranges_url": "https://index.commoncrawl.org/ccbot.json",
 "ip_ranges_endpoint": "https://www.pathwren.workers.dev/ip-ranges/commoncrawl-ccbot.json",
 "ipv4_prefix_count": 4,
 "ipv6_prefix_count": 1,
 "what_it_is": "Common Crawl's corpus builder. It trains nothing itself, but its archive is an input to most open and many closed LLM training sets, which makes it the highest-leverage single entry on this list.",
 "cost_of_blocking": "Future Common Crawl snapshots exclude you, so downstream training sets lose you too — but only going forward. Existing snapshots are permanent and blocking today does not retract them.",
 "operator_docs": "https://commoncrawl.org/ccbot",
 "html_url": "https://www.pathwren.workers.dev/crawler/ccbot.html",
 "json_url": "https://www.pathwren.workers.dev/crawler/ccbot.json",
 "last_reviewed": "2026-09-03",
 "links": [
  {
   "rel": "self",
   "href": "https://www.pathwren.workers.dev/crawler/ccbot.json",
   "type": "application/json"
  },
  {
   "rel": "changes",
   "href": "https://www.pathwren.workers.dev/changes.json?since=111",
   "type": "application/json",
   "title": "What changed since your cursor — poll this instead of re-downloading this document",
   "cursor_param": "since",
   "head_cursor": 111,
   "min_poll_seconds": 21600,
   "how": "Read `cursor` from the response and send it back as `since`. It advances only when something really changed, so an unchanged answer is proof rather than luck — about 2.5 KB, or a 304 with no body if you send back the ETag."
  },
  {
   "rel": "related",
   "href": "https://www.pathwren.workers.dev/data/agents.json",
   "type": "application/json",
   "title": "Every crawler record in one file"
  },
  {
   "rel": "related",
   "href": "https://www.pathwren.workers.dev/crawler/ccbot.md",
   "type": "text/markdown"
  },
  {
   "rel": "related",
   "href": "https://www.pathwren.workers.dev/ip-ranges/commoncrawl-ccbot.json",
   "type": "application/json"
  },
  {
   "rel": "service-desc",
   "href": "https://www.pathwren.workers.dev/openapi.json",
   "type": "application/json",
   "title": "Every read endpoint, described formally"
  }
 ]
}