Claude Code's OAuth API Key Issue: What Happened and How to Prepare for Next Time

Claude Code's recent OAuth API key expiration incident highlights the importance of monitoring service status and having fallback workflows. What Happened On April 6, 2026, Claude Code users began reporting widespread authentication failures. The core issue: OAuth API keys were expiring daily instead of maintaining their expected validity period. Users encountered 500 errors and timeouts when trying to reauthorize, effectively locking them out of their coding workflows. Initially, the official Claude status page showed no indication of problems, which amplified frustration. However, within hours, Anthropic updated the status page to acknowledge the issue—a move that commenters praised as crucial for rebuilding trust. What This Means For Your Workflow When Claude Code goes down, your development velocity hits zero if you're fully dependent on it. The incident reveals several critical points: Status monitoring is non-optional: https://status.claude.com should be bookmarked. During the ou