# Claude-User

> Anthropic · inference

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

- **name:** Claude-User
- **operator:** Anthropic
- **purpose:** inference
- **ua_substring:** Claude-User
- **robots_token:** Claude-User
- **respects_robots:** yes
- **verify:** reverse DNS to an Anthropic host
- **notes:** Fetches a page in real time when a Claude user's prompt references it. User-initiated, not bulk crawling.
- **canonical_name:** Claude-User
- **user_agent_token:** Claude-User
- **ua_full:** — (verify-against-primary-at-build)
- **bot_type:** user-action-fetcher
- **bot_type_extension:** —
- **opt_out_mechanism:** robots.txt disallow (User-agent: Claude-User)
- **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:** allow (default) — user-initiated fetch on behalf of a real Claude user; blocking degrades that user's experience without protecting against training.
- **citation_referral_value:** medium (fetches in response to a user; can surface your page to that user)
- **cloudflare_verified_category:** — (verify-against-primary-at-build)
- **status:** active
- **triples:** ["Claude-User","operated_by","Anthropic"], ["Claude-User","has_bot_type","user-action-fetcher"], ["Claude-User","verified_via","published-IP-range"], ["Claude-User","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"}