# Claim 40

Anthropic publishes the IP address ranges used by Claude-User as a JSON file at https://claude.com/crawling/bots.json.

entity: Claude-User
field: publishes_ip_list
value: yes
statement: Anthropic publishes the IP address ranges used by Claude-User as a JSON file at https://claude.com/crawling/bots.json.
evidence_url: https://claude.com/crawling/bots.json
evidence_quote: "If a crawler has a source IP address on this list, it indicates that the crawler is coming from Anthropic." source dated 2026-08-18
method: vendor_doc
verified_at: 2026-09-13
confidence: high
status: current
supersedes: none

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