Claude.ai unavailable and elevated errors on the API

Update timeline

1. investigating Apr 28, 2026, 05:41 PM UTC

   We are investigating an issue preventing users from reaching Claude.ai, and will provide an update as soon as possible.

2. identified Apr 28, 2026, 05:51 PM UTC

   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.

3. identified Apr 28, 2026, 06:33 PM UTC

   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.

4. monitoring Apr 28, 2026, 06:59 PM UTC

   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.

5. resolved Apr 28, 2026, 07:15 PM UTC

   This incident has been resolved.