Anthropic

Anthropic documents fixed addresses for Claude API and Console traffic, and publishes a JSON feed of crawler prefixes for ClaudeBot, Claude-User, and Claude-SearchBot.

Claude API & Console IP addresses

Official feed

Official fixed IPv4 and IPv6 ranges for inbound API/Console and documented outbound IPv4 (e.g. MCP callbacks) — open Anthropic’s IP addresses doc for the current list.

https://platform.claude.com/docs/en/api/ip-addresses

Web crawlers (ClaudeBot, Claude-User, Claude-SearchBot)

Official feed

Official JSON of Anthropic crawler IPv4 prefixes. Use robots.txt for crawl policy; use this feed to verify crawler source IPs.

https://claude.com/crawling/bots.json

Documentation

Anthropic Help - web crawling & blocking

Published ranges

Documentation

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