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claude-code - 💡(How to fix) Fix [BUG] HTTP MCP servers working in 2.1.140 and broken in 2.1.142.

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Error Message

Actual behaviour: Startup log shows [MCP] --mcp-config servers running fully async (nonblocking) but no connection to the MCP URL is ever attempted. No error is logged. Tools never appear.

Error Messages/Logs

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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

{ "mcpServers": { "pixellab": { "type": "http", "url": "https://api.pixellab.ai/mcp", "headers": { "Authorization": "Bearer <token>" } } } }

What Should Happen?

Expected behaviour: On startup, Claude Code connects to the HTTP MCP server, fetches the tools list, and makes them available.

Actual behaviour: Startup log shows [MCP] --mcp-config servers running fully async (nonblocking) but no connection to the MCP URL is ever attempted. No error is logged. Tools never appear.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

Add an HTTP MCP server to ~/.claude/settings.json as above Reload the VS Code window Observe no connection attempt in the Claude Code output log Platform: Windows 11, VS Code extension v2.1.142 Regression from: v2.1.140 (confirmed working)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.140

Claude Code Version

2.1.142

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

No response

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claude-code - 💡(How to fix) Fix [BUG] HTTP MCP servers working in 2.1.140 and broken in 2.1.142.