{
  "id": "claude-user",
  "name": "Claude-User",
  "operator": {
    "name": "Anthropic",
    "url": "https://www.anthropic.com"
  },
  "description": "Anthropic's user-triggered fetcher, used when a person asks Claude to visit a specific web page (e.g. via tool use in a conversation).",
  "docs": [
    "https://support.anthropic.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler"
  ],
  "category": "ai-assistant",
  "user_agents": {
    "patterns": [
      "Claude-User/\\d"
    ],
    "instances": [
      "Mozilla/5.0 (compatible; Claude-User/1.0; +Claude-User@anthropic.com)"
    ]
  },
  "behavior": {
    "respects_robots_txt": false,
    "robots_token": "Claude-User"
  },
  "verification": [
    {
      "type": "cidr_feed",
      "url": "https://claude.com/crawling/bots.json",
      "format": "prefixes"
    }
  ],
  "tier": 1,
  "tier_label": "Fully verifiable",
  "first_seen": "2026-07-08T19:13:49.571Z",
  "resolved_cidrs": [
    "136.107.176.208/32",
    "16.58.26.69/32",
    "18.225.238.228/32",
    "18.227.226.255/32",
    "20.102.46.224/28",
    "20.64.57.208/28",
    "216.73.216.0/22",
    "34.11.34.31/32",
    "34.150.241.79/32",
    "34.162.191.81/32",
    "34.162.230.222/32",
    "34.162.244.71/32",
    "34.182.140.95/32",
    "34.182.161.143/32",
    "34.182.218.27/32",
    "34.182.220.85/32",
    "34.182.222.37/32",
    "34.182.225.167/32",
    "34.182.226.151/32",
    "34.182.226.221/32",
    "34.186.108.163/32",
    "34.85.172.162/32",
    "35.221.29.174/32",
    "35.245.175.129/32",
    "35.245.89.239/32",
    "40.124.101.48/28"
  ]
}