[BUG] Error: Authorization with the MCP server failed

Preflight Checklist

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

What's Wrong?

Reference ID: ofid_17d9c5879fdb484e
/mcp command returned "Authentication successful, but server still requires authentication"

What Should Happen?

I should be connected to /mcp

Error Messages/Logs

Steps to Reproduce

/mcp

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.81

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_