How to install Arc UI in Gemini CLI

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We found Arc UI in the official MCP registry. Our automated check passed on Nov 1, 2026 (it confirms the server is published and reachable), but no one at CuratedMCP has reviewed its code, permissions or credentials handling. Check what it can access before you give it keys. Scan your machine free to see every MCP server you have installed.

Steps

1Open ~/.gemini/settings.json (or .gemini/settings.json in your project)
2Add the entry below. If the file already has "mcpServers", add just the inner entry
3Restart Gemini CLI and run /mcp to confirm

Configuration

~/.gemini/settings.json

{
  "mcpServers": {
    "arc-library": {
      "httpUrl": "https://uiarc.dev/api/mcp"
    }
  }
}

Header	Required	What it is
Authorizationsecret	No	Optional. "Bearer arc_pro_..." from uiarc.dev/account unlocks Arc Pro source. Free items work without it.

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