bun-uia

bun-uia is a local MCP server: Playwright for the Windows desktop, from Bun — drive native GUIs via UI Automation + MCP. Install it from npm as bun-uia.

Claude CodeCodexAntigravity

commandprompt

Terminal

claude mcp add bun-uia -e BUN_UIA_PROFILE=... -e BUN_UIA_OS=... -e BUN_UIA_ALLOW=... -e BUN_UIA_DENY=... -e BUN_UIA_CURSOR=... -e BUN_UIA_FS_ROOT=... -- npx -y bun-uia

Run in your project folder. Add --scope user to use it everywhere.

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia"
      ],
      "env": {
        "BUN_UIA_PROFILE": "...",
        "BUN_UIA_OS": "...",
        "BUN_UIA_ALLOW": "...",
        "BUN_UIA_DENY": "...",
        "BUN_UIA_CURSOR": "...",
        "BUN_UIA_FS_ROOT": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

• Runtime: Node.js 18+ (runs with npx).
• MCP client: Claude Code, Codex, Antigravity, Claude Desktop, Cursor or any other client that speaks MCP over stdio.
• Environment variables: BUN_UIA_PROFILE, BUN_UIA_OS, BUN_UIA_ALLOW, BUN_UIA_DENY, BUN_UIA_CURSOR, BUN_UIA_FS_ROOT