[BUG]

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?

The Notion MCP server (https://mcp.notion.com/mcp) shows "✓ connected" in /mcp menu but fails to authenticate for actual use. The OAuth flow works in Claude Desktop but not in Claude Code CLI.

When checking claude mcp get notion, the status shows "! Needs authentication" despite showing "connected" in the /mcp menu.

Direct access to the MCP URL returns: {"error":"invalid_token","error_description":"Missing or invalid access token"}

What Should Happen?

After running claude mcp add --transport http notion https://mcp.notion.com/mcp and completing the OAuth flow via /mcp, the Notion MCP tools should become available and OAuth tokens should be stored in ~/.claude.json for authentication.

Error Messages/Logs

Status: ! Needs authentication

Direct URL test error:
{"error":"invalid_token","error_description":"Missing or invalid access token"}

Config shows no auth tokens:
"mcpServers": {
  "notion": {
    "type": "http",
    "url": "https://mcp.notion.com/mcp"
  }
}

Steps to Reproduce

1. Run: claude mcp add --transport http notion https://mcp.notion.com/mcp
2. Run: /mcp command in Claude Code
3. Observe: "claude.ai Notion • ✓ connected" appears
4. Run: claude mcp get notion
5. Observe: Status shows "! Needs authentication"
6. Check: cat ~/.claude.json
7. Observe: No OAuth tokens stored for notion MCP server

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.29

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

Root cause: Claude Code CLI is authenticated with claude.ai but OAuth tokens for MCP servers are not shared/accessible. Claude Desktop likely has a browser-based OAuth flow that Claude Code lacks.

Expected config structure (not present):
"mcpServers": {
"notion": {
"type": "http",
"url": "https://mcp.notion.com/mcp",
"auth": {
"type": "oauth",
"token": "..."
}
}
}

This works in Claude Desktop, suggesting the issue is specific to Claude Code CLI's OAuth handling for MCP servers.