Intermittent API Error 500 during Claude Code sessions

[lcornejoduenas]

Description

Getting frequent intermittent API Error: 500 responses during normal Claude Code CLI sessions. The errors occur randomly during tool execution and conversation flow, requiring the user to manually retry/continue.

Error message

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CYV9t3rgn7iL3GdkPSfrY"}

Multiple occurrences with different request IDs in the same session:

• req_011CYV9t3rgn7iL3GdkPSfrY
• req_011CYVAcVE6E7cxtLL3VSr5x

Environment

• OS: Linux (WSL2) — Linux 6.6.87.1-microsoft-standard-WSL2
• Claude Code model: claude-opus-4-6
• Date: 2025-02-25

Steps to reproduce

1. Start a Claude Code session with multiple tool calls (MCP tools, file writes, bash commands)
2. Execute several operations in sequence
3. Error appears intermittently, interrupting the workflow

Impact

• Breaks the flow of multi-step tasks
• User has to manually ask Claude to continue after each error
• No data loss, but significantly impacts productivity

Expected behavior

Tool calls and responses should complete without 500 errors from the API.

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Intermittent 500 Internal Server Errors during Claude Code sessions #28648
2. Intermittent API 500 errors #28616
3. [BUG] Intermittent API 500 Internal Server Error (Feb 25, 2026, Opus 4.6) #28624

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

[stevenpetryk]

Duplicate of #28602