WpfPilot MCP

WpfPilot MCP is a local Model Context Protocol server for Windows WPF applications. It lets AI coding agents inspect UI Automation trees, click and type through semantic selectors, diagnose WPF-specific issues, record workflows, and generate xUnit + FlaUI tests.

Features

• Attach to or launch WPF processes.

• Capture semantic UI snapshots (selectors, not screen coordinates).

• Query text, value, state, bounds, patterns, children, ancestors, siblings, and selection.

• Act with verbs such as click, set value, select, toggle, expand, collapse, scroll, and drag/drop.

• Wait and assert on UI state with structured errors.

• Capture screenshots.

• Record workflows and generate test code.

• Optional in-process probe for ViewModel, binding, command, validation, and dispatcher diagnostics.

Requirements

• Windows 10/11.

• A WPF application to automate.

• Node.js 18+ if using npx (recommended). No .NET SDK required for the release binary or npm launcher.

Getting started

Add this to your MCP client configuration (global or project-scoped):

{
  "mcpServers": {
    "wpfpilot-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@skuzadev/wpfpilot-mcp"]
    }
  }
}

Or run directly (stdio; waits for an MCP client):

npx -y @skuzadev/wpfpilot-mcp

The npm launcher downloads the latest Windows release binary on first run, then proxies stdio to it.

Other installs (persistent wpfpilot-mcp command, release zip, uninstall): see Install WpfPilot.

Popular clients

Use the standard config above unless noted. More clients: docs/all-clients.md.

Global: ~/.cursor/mcp.json (do not add a project .cursor/mcp.json unless you need a repo-specific override)

{
  "mcpServers": {
    "wpfpilot-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@skuzadev/wpfpilot-mcp"]
    }
  }
}

Or: Cursor Settings → MCP → Add new MCP Server — command npx, args -y @skuzadev/wpfpilot-mcp.

cursor-agent mcp list
cursor-agent mcp list-tools wpfpilot-mcp

codex mcp add wpfpilot-mcp -- npx -y @skuzadev/wpfpilot-mcp
codex mcp list

Or ~/.codex/config.toml:

[mcp_servers.wpfpilot-mcp]
command = "npx"
args = ["-y", "@skuzadev/wpfpilot-mcp"]
enabled = true
startup_timeout_sec = 30
tool_timeout_sec = 60

claude mcp add --transport stdio wpfpilot-mcp -- npx -y @skuzadev/wpfpilot-mcp
claude mcp list

Project .mcp.json:

{
  "mcpServers": {
    "wpfpilot-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@skuzadev/wpfpilot-mcp"]
    }
  }
}

Windows config: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "wpfpilot-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@skuzadev/wpfpilot-mcp"]
    }
  }
}

Restart Claude Desktop after saving.

Create .vscode/mcp.json:

{
  "servers": {
    "wpfpilot-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@skuzadev/wpfpilot-mcp"]
    }
  }
}

Or: code --add-mcp '{"name":"wpfpilot-mcp","command":"npx","args":["-y","@skuzadev/wpfpilot-mcp"]}'

First prompt

After connecting the MCP client, ask:

List the WpfPilot tools and attach to my running WPF application.

Useful follow-up prompts:

Show the main window UI tree.
Click the Save button using a selector, not coordinates.
Wait until the status text says Saved.
Why is the Submit button disabled?
Record this workflow and generate an xUnit test.

Tools

Full tool list: docs/tools-reference.md.

Optional WPF probe

The probe runs inside your WPF process and exposes diagnostics that UI Automation cannot see directly (bindings, ViewModels, commands, validation).

Use wpf_probe_connect, then inspect my ViewModel and binding errors.

Setup: docs/probe-setup.md.

Safety

WpfPilot is intended for local development and test automation.

• It runs as your user account and can interact with UI visible to that account.

• It does not expose general shell, registry, or arbitrary filesystem tools through MCP.

• Mutating UI actions are audited under the user's local app data folder.

• The probe requires explicit installation in the target WPF app.

• Treat every MCP server as trusted local code before enabling it in an agent.

Troubleshooting

wpfpilot-mcp is not recognized

Restart your terminal after running the installer, or use the full path to wpfpilot-mcp.exe in your MCP client configuration. See all-clients.md.

Server starts but no tools appear

Restart the MCP client and check its MCP logs. Also verify npx -y @skuzadev/wpfpilot-mcp runs from a normal terminal.

Cannot attach to an app

Make sure the WPF app is running in the same user session and at a compatible privilege level. If the app runs as administrator, the MCP client may also need to run elevated.

Probe cannot connect

Confirm the target app called ProbeHost.Start(), then use wpf_probe_status and wpf_probe_connect. If needed, pass wpfpilot-mcp-probe-{ProcessId} explicitly.

Documentation

• All MCP clients

• Tool reference

• Probe setup

• Architecture

• Examples

• Development

• Releasing

Contributing

See CONTRIBUTING.md.

License

MIT. See LICENSE.