Outage in Claude
Elevated TCP three-way handshake failures on api.anthropic.com
Resolved MinorIncident Report
Summary AI Generated
Network degradation at an upstream peering point caused TCP handshake failures and connection timeouts for some API requests to api.anthropic.com, affecting Claude.ai service. API requests that successfully established connections continued to work normally. The issue was resolved after 48 minutes by implementing a fix and working with upstream providers.
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.
Components affected
Claude claude.aiLatest Updates ( sorted recent to last )
RESOLVED
about 13 hours ago - at 03/06/2026 04:23PM
This incident has been resolved.
MONITORING
about 13 hours ago - at 03/06/2026 04:01PM
A fix has been implemented and we are monitoring the results.
INVESTIGATING
about 13 hours ago - at 03/06/2026 03:34PM
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.
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