A local MCP server that provides resources for NixOS, Home Manager, and nix-darwin. These are tools for managing operating-system and developer-machine configuration with Nix.

Use it for tasks involving NixOS, Home Manager, or nix-darwin configuration and related reference information.

It gives a coding agent a way to access relevant configuration resources when working with these Nix-based systems. The input does not specify which operations are supported.

nixos — MCP server for Claude Code and Codex by Baughn: A local MCP server that provides resources for NixOS…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add mcp/baughn/machine-config-template/nixos

Clone the repo

git clone --depth 1 https://github.com/Baughn/machine-config-template

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/baughn/machine-config-template/nixos.svg)](https://agentmods.dev/mcp/baughn/machine-config-template/nixos)

Your own site

<a href="https://agentmods.dev/mcp/baughn/machine-config-template/nixos"><img src="https://agentmods.dev/badge/mcp/baughn/machine-config-template/nixos.svg" alt="Measured on agentmods" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

nixos scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.mcp.json · 10 lines

What it actually says

{
  "nixos": {
    "type": "stdio",
    "command": "uvx",
    "args": [
      "mcp-nixos"
    ],
    "env": {}
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

3d ago First seen · 10 lines scan A f241d24bf86c

Subscribe to this mod's changes

nixos is an MCP server published in the GitHub repository Baughn/machine-config-template (5 stars, last pushed 8mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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