Intermittent API Error 500 during Claude Code sessions

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.