Bun Uia

Browser Automation npm v1.9.1

Playwright for the Windows desktop, from Bun — drive native GUIs via UI Automation + MCP.

View source ↗ Generate config for multiple servers More servers

Install

Pin version registry version 1.9.1

npm
npx -y bun-uia

npm
npx -y bun-uia@1.9.1

Setup by client

Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.

claude_desktop_config.json

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia"
      ]
    }
  }
}

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia@1.9.1"
      ]
    }
  }
}

Format verified against the official Claude Desktop docs ↗.

terminal

claude mcp add bun-uia -- npx -y bun-uia

claude mcp add bun-uia -- npx -y bun-uia@1.9.1

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia"
      ]
    }
  }
}

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia@1.9.1"
      ]
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json

{
  "servers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia"
      ]
    }
  }
}

{
  "servers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia@1.9.1"
      ]
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia"
      ]
    }
  }
}

{
  "mcpServers": {
    "bun-uia": {
      "command": "npx",
      "args": [
        "-y",
        "bun-uia@1.9.1"
      ]
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

BUN_UIA_PROFILE — Capability profile: 'readonly' (inspect/read only), 'safe' (read + input + window — default), or 'full' (also os + fs tools).
BUN_UIA_OS — Set to '1' to allow OS-level tools (launch_app, run_program, open_path) AND filesystem tools (read_file, write_file, list_dir) regardless of profile.
BUN_UIA_ALLOW — Comma-separated tool names or categories to additionally allow on top of the profile.
BUN_UIA_DENY — Comma-separated tool names or categories to deny, overriding the profile and BUN_UIA_ALLOW.
BUN_UIA_CURSOR — Set to 'never' to forbid the real-cursor fallback entirely (strictly cursor-free). By default clicks/drags are cursor-free but fall back to the real hardware cursor when no cursor-free path exists.
BUN_UIA_FS_ROOT — Sandbox root directory that read_file/write_file/list_dir are confined to when fs tools are enabled.

GitHub

⭐ 20 stars · 最近更新于 30 天前

About this server

bun win32 Zero dependency Win32 FFI bindings for Bun on Windows. Each system DLL is a standalone @bun win32/ package with full type definitions. Install Requires Bun = 1.1.0 and Windows 10+. Usage After the first call resolves the symbol via dlopen / dlsym , the native function pointer is cached dir…

Summary from the project README — github.com/ObscuritySRL/bun-win32

Distributed as npm, listed under Browser Automation. Review our MCP security guide before granting access to real data.

Frequently asked questions

What does the Bun Uia MCP server do?

How do I install Bun Uia?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Bun Uia free to use?

The MCP server itself is free to install. The source is public on https://github.com/ObscuritySRL/bun-win32. Any third-party service it calls may require its own API key and account.

Which clients support Bun Uia?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

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