io.github.pironjulien/nexus-windows-codex

nexus-windows-codex

Windows computer use in the background for Codex: UI Automation, Win32 messages, read back.

3 14 tools GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 1d ago

Works with most clients

Transport: stdio, sse

14 tools · ~532 tok

Grade B · 0.3% of 200K ctx

MCPpedia last refreshed this data 1d ago

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io.github.pironjulien/nexus-windows-codex is an MCP server that windows computer use in the background for Codex: UI Automation, Win32 messages, read back. Its tool list has not been published yet over stdio and sse, requires no API key, and scores 83/100 on MCPpedia's security, maintenance and efficiency rubric.

Other

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-pironjulien-nexus-windows-codex": {
      "args": [
        "-y",
        "nexus-windows-codex"
      ],
      "command": "npx"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-pironjulien-nexus-windows-codex)](https://mcppedia.org/s/io-github-pironjulien-nexus-windows-codex)

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What io.github.pironjulien/nexus-windows-codex does

Windows computer use in the background for Codex: UI Automation, Win32 messages, read back.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

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Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

83/100across 5 weighted dimensions

How we score →

0255075100

−17

Security

Maintenance

Efficiency

Documentation

Compatibility

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Security

OSV.dev

No known CVEs.

Checked nexus-windows-codex against OSV.dev.

Inventory

Tools (14)

Click any tool to inspect its schema.

~532 tokens total

Community

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Frequently Asked Questions

Is io.github.pironjulien/nexus-windows-codex safe to use?: io.github.pironjulien/nexus-windows-codex has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.pironjulien/nexus-windows-codex?: io.github.pironjulien/nexus-windows-codex supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.pironjulien/nexus-windows-codex do?: io.github.pironjulien/nexus-windows-codex provides 14 tools: auto, bind, WS_EX_NOACTIVATE, Why, Installation and 9 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.pironjulien/nexus-windows-codex?: io.github.pironjulien/nexus-windows-codex is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.
Is io.github.pironjulien/nexus-windows-codex actively maintained?: io.github.pironjulien/nexus-windows-codex is actively maintained - last commit was 1 day ago. It has 3 GitHub stars.

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Community

Discussion

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

NexusWindows for Codex

NexusWindows: Windows computer use for AI agents, in the background. Works with Claude, Codex and Antigravity.

Windows computer use for Codex, in the background. An MCP server (nexus-windows-codex, one npx command) that lets OpenAI Codex see and operate Windows desktop applications while the user keeps their mouse, keyboard and foreground window. Codex's own Computer Use came to macOS first; on Windows, OpenAI's documentation says to keep the target app visible on the active desktop while it runs (Codex docs). NexusWindows for Codex has its own local .NET helper for everything: window inventory, UI Automation tree, PrintWindow capture of covered windows, Win32 messages and UI Automation patterns without focus, and its own real mouse and keyboard as the last resort, under a shared foreground token. Every action is judged from the application's real state, and a batch needs an explicit postcondition per step. It also ships as a Codex skill that layers the same session over Codex's Computer Use API (@oai/sky).

Version 3.7.2 · Windows 10/11 · Node 22+ · .NET 10 · MIT licence

Why

Codex's built-in Computer Use acts with the physical mouse and keyboard: it brings the target window to the front and the user has to stop working while it acts. Many Windows applications can be driven without that. NexusWindows for Codex tries the background techniques first, judges the result from the application's real state, and only uses its helper's real mouse and keyboard as a fallback, after a pause in the user's own typing and under a token shared with the other agents on the PC.

It is an MCP server (Node, no npm dependency) with a self-contained .NET helper: no listening network port, no token and no private Electron API. The optional Codex skill runs the same session in Codex's Node REPL instead, over Codex's

Frequently Asked Questions

Is io.github.pironjulien/nexus-windows-codex safe to use?

io.github.pironjulien/nexus-windows-codex has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.

How do I install io.github.pironjulien/nexus-windows-codex?

io.github.pironjulien/nexus-windows-codex supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.pironjulien/nexus-windows-codex do?

io.github.pironjulien/nexus-windows-codex provides 14 tools: auto, bind, WS_EX_NOACTIVATE, Why, Installation and 9 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.pironjulien/nexus-windows-codex?

io.github.pironjulien/nexus-windows-codex is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.

Is io.github.pironjulien/nexus-windows-codex actively maintained?

io.github.pironjulien/nexus-windows-codex is actively maintained - last commit was 1 day ago. It has 3 GitHub stars.

NexusWindows for Codex

Version 3.7.2 · Windows 10/11 · Node 22+ · .NET 10 · MIT licence

Part of the Nexus family: NexusWindows (Claude · Codex · Antigravity), NexusBrowser (repo), NexusAndroid (repo). Project page: julienpiron.fr/nexuswindows.

Why

... View full README on GitHub