# ClaudeBot

> Anthropic · training

_The AI Crawler Registry · /crawlers/claudebot · [JSON](/api/crawlers/claudebot) · [all The AI Crawler Registry](/crawlers)_

- **name:** ClaudeBot
- **operator:** Anthropic
- **purpose:** training
- **ua_substring:** ClaudeBot
- **robots_token:** ClaudeBot
- **respects_robots:** yes
- **verify:** reverse DNS (Anthropic does not publish an IP-range file; confirm the PTR resolves to an Anthropic-controlled host)
- **notes:** Crawls content used to train Claude. Honors robots.txt and crawl-delay.
- **canonical_name:** ClaudeBot
- **user_agent_token:** ClaudeBot
- **ua_full:** — (verify-against-primary-at-build)
- **bot_type:** training
- **bot_type_extension:** —
- **opt_out_mechanism:** robots.txt disallow (User-agent: ClaudeBot)
- **published_ip_range_url:** https://claude.com/crawling/bots.json
- **asn:** — (verify-against-primary-at-build)
- **reverse_dns_suffix:** — (verify-against-primary-at-build)
- **supports_web_bot_auth:** — (verify-against-primary-at-build)
- **signature_agent_domain:** — (verify-against-primary-at-build)
- **jwks_url:** — (verify-against-primary-at-build)
- **verification_methods:** published-IP-range, reverse-DNS
- **crawl_traffic_share:** — (verify-against-primary-at-build)
- **targeted_content_type:** HTML, text
- **documentation_url:** https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler
- **first_seen_date:** — (verify-against-primary-at-build)
- **last_verified_date:** 2026-06-15
- **block_vs_allow_recommendation:** conditional — training crawler; allow if you want your content represented in Claude, block via robots.txt to opt out of training. No direct referral traffic.
- **citation_referral_value:** low (training; does not itself cite or refer)
- **cloudflare_verified_category:** — (verify-against-primary-at-build)
- **status:** active
- **triples:** ["ClaudeBot","operated_by","Anthropic"], ["ClaudeBot","has_bot_type","training"], ["ClaudeBot","verified_via","published-IP-range"], ["ClaudeBot","verified_via","reverse-DNS"]
- **attribute_sources:** {"claims":["user_agent_token","robots_token","published_ip_range_url","documentation_url","respects_robots"],"source":"https://support.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler","last_verified":"2026-06-15"}