Claude API & Console IP addresses
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.
Anthropic
Anthropic documents fixed addresses for Claude API and Console traffic, and separate guidance for web crawlers (ClaudeBot and related). Crawler egress may use provider IPs not identical to the published API ranges.
Autonomous systems
Network background
Anthropic documents fixed API/Console ranges on their IP addresses page. Web crawlers may use other provider address space—use crawl policy docs and robots.txt for crawler control.
Published ranges
Official documentation and feeds for each product—open the links for current ranges and verification guidance.
Web crawlers (ClaudeBot, Claude-User, Claude-SearchBot)
Policy and blocking guidance for Anthropic’s web crawlers. Anthropic emphasizes robots.txt; they do not publish a crawler IP prefix feed in the same form as OpenAI.