windows-universal-mcp
A local MCP server for controlling Windows desktop applications through Win32 automation, enabling window listing, launching, clicking, typing, shortcuts, screenshots, and folder monitoring.
README
Windows Universal MCP
English | 中文
Windows Universal MCP is a local Model Context Protocol server for controlling Windows desktop applications through generic Win32 automation.
It provides a small, dependency-free Windows bridge for common desktop actions: listing windows, launching apps, focusing windows, clicking, pasting Unicode text, sending keyboard shortcuts, taking screenshots, and monitoring output folders.
E-mail:heiak@foxmail.com
Features
- List visible top-level Windows application windows.
- Launch local executable files.
- Activate a window by
hwnd. - Click by client or screen coordinates.
- Paste Unicode text from an argument or UTF-8 text file.
- Send
System.Windows.Forms.SendKeyskeyboard sequences. - Capture PNG screenshots of visible windows.
- Monitor a folder for newly created image files.
- Run as a stdio MCP server.
Requirements
- Windows
- Node.js 18+
- Windows PowerShell 5+
- An MCP client that supports stdio servers
No npm dependencies are required.
Installation
Clone or copy this repository, then configure your MCP client to launch server.mjs.
Codex example:
[mcp_servers.windows_universal]
command = "node"
args = ["D:\\path\\to\\windows-universal-mcp\\server.mjs"]
startup_timeout_sec = 30
If node is not in PATH, use an absolute path to node.exe:
[mcp_servers.windows_universal]
command = "C:\\Path\\To\\node.exe"
args = ["D:\\path\\to\\windows-universal-mcp\\server.mjs"]
startup_timeout_sec = 30
Restart the MCP client or open a fresh task after changing MCP config.
Optional Codex Installer
The install helper appends the MCP block to ~\.codex\config.toml and creates a timestamped backup.
.\scripts\install-codex.ps1
Custom paths:
.\scripts\install-codex.ps1 `
-NodePath "C:\Path\To\node.exe" `
-ServerPath "D:\path\to\windows-universal-mcp\server.mjs"
Tools
windows_list_windows
List visible top-level windows with handle, title, class name, process id, process name, process path, and bounds.
Arguments:
titleContains: optional title substring filter.processContains: optional process name/path substring filter.includeEmptyTitles: include visible windows with empty titles.
windows_launch
Launch a local executable.
Arguments:
path: absolute executable path.args: optional argument array.cwd: optional working directory.waitMs: optional delay after launch.
windows_activate
Bring a window to the foreground.
Arguments:
hwnd: window handle fromwindows_list_windows.
windows_click
Click a window by coordinates.
Arguments:
hwnd: target window handle.x: x coordinate.y: y coordinate.coordinateMode:clientorscreen.button:left,right, ormiddle.clicks: number of clicks.
windows_type_text
Paste Unicode text into the currently focused field of a window.
Arguments:
hwnd: target window handle.text: text to paste.textPath: optional UTF-8 file to read text from.restoreClipboard: restore previous clipboard text after paste.submitWithEnter: press Enter after paste.
Use textPath for long text to avoid shell quoting and encoding issues.
windows_send_keys
Send a System.Windows.Forms.SendKeys sequence.
Arguments:
hwnd: target window handle.keys: SendKeys syntax, such as^v,{ENTER},{TAB}, or%{F4}.
windows_screenshot
Capture a PNG screenshot of a visible window or a rectangle inside it.
Arguments:
hwnd: target window handle.outputPath: output PNG path.rect: optional client-relative rectangle withx,y,width,height.
This uses screen capture, so the target window should be visible and unobscured.
windows_monitor_downloads
List newly created image files in a folder.
Arguments:
folder: folder to inspect.sinceIso: optional ISO timestamp. Defaults to ten minutes ago.extensions: optional extension list.
Local Testing
Smoke test:
node .\server.mjs --smoke
MCP protocol test:
node .\test-mcp-client.mjs
Debug a single helper action:
$env:WIN_MCP_ARGS='{"includeEmptyTitles":false}'
node .\server.mjs --call-env windows_list_windows
Repository Layout
windows-universal-mcp/
server.mjs
windows-helper.ps1
test-mcp-client.mjs
package.json
README.md
LICENSE
.gitignore
scripts/
install-codex.ps1
Safety Notes
- This tool controls local Windows UI. Review actions before using it with sensitive apps.
- Do not use it for passwords, payment forms, account creation, or sensitive data entry.
- Runtime screenshots and generated output folders are ignored by
.gitignore.
License
MIT
中文
Windows Universal MCP 是一个本地 Model Context Protocol 服务器,用于通过通用 Win32 自动化能力控制 Windows 桌面应用。
它提供一个轻量、无 npm 依赖的 Windows 桌面桥接层,支持常见本地操作:列出窗口、启动程序、聚焦窗口、点击、粘贴 Unicode 文本、发送快捷键、窗口截图、监控输出目录。
功能
- 列出可见的 Windows 顶层应用窗口。
- 启动本地可执行文件。
- 通过
hwnd激活窗口。 - 按客户端坐标或屏幕坐标点击。
- 从参数或 UTF-8 文本文件粘贴 Unicode 文本。
- 发送
System.Windows.Forms.SendKeys快捷键序列。 - 截取可见窗口的 PNG 截图。
- 监控文件夹中新生成的图片文件。
- 作为 stdio MCP server 运行。
环境要求
- Windows
- Node.js 18+
- Windows PowerShell 5+
- 支持 stdio MCP server 的 MCP 客户端
不需要安装任何 npm 依赖。
安装
克隆或复制本仓库,然后在 MCP 客户端配置中启动 server.mjs。
Codex 配置示例:
[mcp_servers.windows_universal]
command = "node"
args = ["D:\\path\\to\\windows-universal-mcp\\server.mjs"]
startup_timeout_sec = 30
如果 node 不在 PATH 中,请使用 node.exe 的绝对路径:
[mcp_servers.windows_universal]
command = "C:\\Path\\To\\node.exe"
args = ["D:\\path\\to\\windows-universal-mcp\\server.mjs"]
startup_timeout_sec = 30
修改 MCP 配置后,需要重启 MCP 客户端,或打开一个新的任务/会话,让新 server 生效。
可选 Codex 安装脚本
安装脚本会把 MCP 配置追加到 ~\.codex\config.toml,并创建带时间戳的备份。
.\scripts\install-codex.ps1
也可以指定自定义路径:
.\scripts\install-codex.ps1 `
-NodePath "C:\Path\To\node.exe" `
-ServerPath "D:\path\to\windows-universal-mcp\server.mjs"
工具列表
windows_list_windows
列出可见顶层窗口,包含窗口句柄、标题、类名、进程 ID、进程名、进程路径和窗口边界。
参数:
titleContains:可选,按窗口标题子串过滤。processContains:可选,按进程名或进程路径子串过滤。includeEmptyTitles:是否包含空标题窗口。
windows_launch
启动本地可执行文件。
参数:
path:可执行文件绝对路径。args:可选,参数数组。cwd:可选,工作目录。waitMs:可选,启动后的等待毫秒数。
windows_activate
将窗口切到前台。
参数:
hwnd:来自windows_list_windows的窗口句柄。
windows_click
按坐标点击窗口。
参数:
hwnd:目标窗口句柄。x:x 坐标。y:y 坐标。coordinateMode:client或screen。button:left、right或middle。clicks:点击次数。
windows_type_text
向当前聚焦的输入区域粘贴 Unicode 文本。
参数:
hwnd:目标窗口句柄。text:要粘贴的文本。textPath:可选,要读取的 UTF-8 文本文件路径。restoreClipboard:粘贴后是否恢复原剪贴板文本。submitWithEnter:粘贴后是否按 Enter。
长文本建议使用 textPath,避免命令行引号和编码问题。
windows_send_keys
发送 System.Windows.Forms.SendKeys 快捷键序列。
参数:
hwnd:目标窗口句柄。keys:SendKeys 语法,例如^v、{ENTER}、{TAB}或%{F4}。
windows_screenshot
截取可见窗口或窗口内指定矩形区域,保存为 PNG。
参数:
hwnd:目标窗口句柄。outputPath:输出 PNG 路径。rect:可选,客户端坐标矩形,包含x、y、width、height。
该功能使用屏幕截图,所以目标窗口应保持可见且不被遮挡。
windows_monitor_downloads
列出某个文件夹中新生成的图片文件。
参数:
folder:要检查的文件夹。sinceIso:可选,ISO 时间戳,默认检查最近十分钟。extensions:可选,扩展名列表。
本地测试
Smoke test:
node .\server.mjs --smoke
MCP 协议测试:
node .\test-mcp-client.mjs
单独调试某个 helper action:
$env:WIN_MCP_ARGS='{"includeEmptyTitles":false}'
node .\server.mjs --call-env windows_list_windows
仓库结构
windows-universal-mcp/
server.mjs
windows-helper.ps1
test-mcp-client.mjs
package.json
README.md
LICENSE
.gitignore
scripts/
install-codex.ps1
安全说明
- 该工具会控制本地 Windows UI。对敏感应用执行操作前,请先确认操作内容。
- 不建议用于密码、支付表单、账号创建或敏感数据输入。
- 运行截图和生成输出目录已在
.gitignore中忽略。
License / 许可证
MIT
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