Elevated TCP three-way handshake failures on api.anthropic.com

Incident Report for Claude

Resolved

This incident has been resolved.

Posted Mar 06, 2026 - 16:23 UTC

Monitoring

A fix has been implemented and we are monitoring the results.

Posted Mar 06, 2026 - 16:01 UTC

Investigating

Some API requests to api.anthropic.com are experiencing connection timeouts due to network degradation at an upstream peering point. Requests that successfully connect are unaffected. We are working with our upstream providers to resolve the issue.

Posted Mar 06, 2026 - 15:34 UTC

This incident affected: claude.ai.