Stop debugging. Start fixing.
25 of the 50 most common Claude Code errors, ranked by how often developers encounter them. Each article follows the same structure:
- The exact error message
- The root cause
- The fix (with code)
- How to prevent it
| # | Error |
|---|---|
| 01 | Claude API Error 401 authentication_error Fix |
| 02 | Claude Code Error: Unexpected Token in JSON Response Fix |
| 03 | Stream Idle Timeout -- Fix Partial Response Error |
| 04 | Fix: Claude Code Image 400 Error Loop |
| 05 | Fix: MCP Server Disconnected Error |
| 06 | Fix: SDK TypeError: terminated Streaming |
| 07 | Claude API Error 413 request_too_large Fix |
| 08 | Fix Claude API Error 500 Apierror Explained |
| 09 | Fix: Claude Code Slow Response Latency |
| 10 | Fix Claude Code TLS/SSL Errors Behind Proxy |
| 11 | Fix 'command not found: claude' After Install |
| 12 | Fix Claude Code Install Killed on Linux |
| 13 | Fix Claude Tool Use Not Working |
| 14 | Claude API Error 429 rate_limit_error Fix |
| 15 | Claude API Error 529 overloaded_error Fix |
| 16 | Fix Docker Build Failures When Using Claude Code |
| 17 | Fix: Claude Code Auth Fails on Headless Linux |
| 18 | Fix: Claude Code High Token Usage |
| 19 | Fix Claude Code Login -- Cannot Paste Auth Code |
| 20 | Fix Claude Code NPM Install Eacces Permission |
| 21 | Fix Prisma Migration Failures with Claude Code |
| 22 | Fix WebSocket Connection Failures in Claude Code |
| 23 | Fix Claude Opus Prefill Not Supported Error |
| 24 | Fix Claude Code Econnrefused MCP |
| 25 | Fix ESLint and Prettier Conflicts in Claude Code Projects |
25 more error fixes are available in the complete Playbook.