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Claude Code MCP configurations from claude.ai are all stuck on "needs authentication" #54

@iwaesc

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@iwaesc

MacOS version: 26.4.1 (25E253)
sbx version: v0.25.0 20cff0e2d724ae7e2a5fcb5fa38e4d45f1432cc7
Claude Code v2.1.110
sbx policy is set to default-allow-all

Unlike the old docker sandbox, sbx with Claude Code doesn't seem to work with MCP configurations that come from claude.ai. These are shared organization-wide MCP configs that are automatically added by logging into a Claude account, NOT local MCPs managed through claude mcp add. Those ones seem to work just fine.

All of my claude.ai MCP configurations (26 of them) are stuck on △ needs authentication.

When I attempt to authenticate, it brings up a link, which I click and go through completely in my browser. But the TUI output is persistently stuck on "Press Enter after authenticating in your browser". Pressing Enter does nothing.

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