API Error 500: Internal server error

Resolved 💬 6 comments Opened Feb 25, 2026 by orbitalelliott Closed Feb 25, 2026

Bug Report

Error: API 500 Internal Server Error during Claude Code session

API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CYVALSrX44fa3VBaXRkEE"}

Request ID: req_011CYVALSrX44fa3VBaXRkEE

Context:

  • Model: claude-opus-4-6
  • Platform: macOS (Darwin 25.3.0)
  • Date: 2026-02-25
  • Occurred during normal conversation with MCP tool calls (stdio transport, local Node.js MCP server)

No specific repro steps — appeared as a transient 500 during an interactive session.

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