Outage in Claude
Claude.ai unavailable and elevated errors on the API
Resolved MajorIncident Report
Summary AI Generated
Claude.ai experienced a major outage lasting 1.5 hours that prevented users from accessing the web interface, caused authentication errors on the API, and affected the console, with users reporting connection failures, server busy messages, and inability to log in across desktop and web platforms. The API returned 529 errors indicating the authentication service was temporarily unavailable, while some users found mobile apps continued working intermittently. The incident was resolved after engineers identified and fixed the underlying authentication service issues.
We are investigating an issue preventing users from reaching Claude.ai, and will provide an update as soon as possible.
Components affected
Claude claude.ai Claude console.anthropic.com Claude api.anthropic.comLatest Updates ( sorted recent to last )
RESOLVED
about 11 hours ago - at 04/28/2026 07:15PM
This incident has been resolved.
MONITORING
about 12 hours ago - at 04/28/2026 06:59PM
We are seeing success rates across all services return to normal, and are monitoring closely to prevent any further issues. Impact occurred from 17:34–18:52 UTC.
IDENTIFIED
about 12 hours ago - at 04/28/2026 06:33PM
We are continuing to work to resolve the issues preventing users from accessing Claude.ai, and causing elevated authentication errors for requests to the API and Claude Code.
IDENTIFIED
about 13 hours ago - at 04/28/2026 05:51PM
We have identified an issue resulting in elevated errors on the Anthropic API, as well as issues accessing Claude.ai, including log-in paths for Claude Code. We are working to resolve these issues, and will provide an update as soon as possible.
INVESTIGATING
about 13 hours ago - at 04/28/2026 05:41PM
We are investigating an issue preventing users from reaching Claude.ai, and will provide an update as soon as possible.
source IsDown
Widespread Claude service outage
Reports started 8 minutes before official outage was reported
Users report Claude not loading with error messages about unknown errors and connection issues, affecting Canada.
Latest Claude outages
Elevated errors on Claude Opus 4.7 - about 7 hours ago
Elevated errors on Claude Haiku 4.5 - about 18 hours ago
Elevated billing related errors on Claude.ai - 1 day ago
Elevated errors on Claude Opus 4.7 - 4 days ago
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