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  1. Home
  2. šŸ–„ļø OS Automation
  3. MCP Nixos
MCP Nixos logo
Health: ActiveRecent health check succeeded.Last checked 9/7/2026, 4:31:29 AM

MCP Nixos

User RatingsBe the first to rate and review this MCP server!
View Repository825 GitHub StarsTotal stargazers on GitHub for the source repository (825 stars).Visit Website
nixnixospackagesconfigurationdeveloper-tools

Queries NixOS, Home Manager, nix-darwin, Nixvim, and related sources for accurate package and configuration information.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to CursorAdd to VS Code
Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ā–¾

Client Config & Setup

Choose your client or environment
Target File:~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "utensils-mcp-nixos": {
      "command": "uvx",
      "args": [
        "mcp-nixos"
      ]
    }
  }
}

šŸ’” Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Install Directory Badge Claim listing AlternativesšŸ–„ļø More in OS Automation

Overview

MCP-NixOS provides unified search and lookup for Nix packages, system options, Home Manager settings, nix-darwin options, and other Nix resources. Use it when an AI agent needs verified package names, option details, documentation, cache status, or flake information. It runs on Windows, macOS, and Linux without requiring Nix, except for local flake input exploration.

Use cases

•Search NixOS packages and programs
•Inspect NixOS, Home Manager, or nix-darwin options
•Check package versions and binary cache status
•Browse Nix documentation and functions
•Explore local flake inputs

Key features

•Unified search and information queries through the nix tool
•NixOS package, option, and program lookup
•Home Manager, nix-darwin, Nixvim, and NVF option browsing
•FlakeHub, Noogle, NixOS Wiki, and nix.dev queries
•Historical package versions with commit hashes
•Binary cache status and local flake input inspection

Capabilities & Tool Schemas

Inspect callable tools, capabilities, and parameters exposed to AI agents by MCP Nixos.

Extracted Tool Capabilities
Unified search and information queries through the nix tool
NixOS package, option, and program lookup
Home Manager, nix-darwin, Nixvim, and NVF option browsing
FlakeHub, Noogle, NixOS Wiki, and nix.dev queries
Historical package versions with commit hashes
Binary cache status and local flake input inspection

Documentation Overview

MCP-NixOS - Because Your AI Shouldn't Hallucinate Package Names

MCP Toplist

CI codecov PyPI FlakeHub Python 3.11+ CodeRabbit Pull Request Reviews Built with Claude

Quick Start

🚨 No Nix/NixOS Required! Works on any system - Windows, macOS, Linux. You're just querying APIs.

Option 1: uvx (Recommended)

Install MCP Server

config.json
{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": ["mcp-nixos"]
    }
  }
}

Option 2: Nix

Install MCP Server

config.json
{
  "mcpServers": {
    "nixos": {
      "command": "nix",
      "args": ["run", "github:utensils/mcp-nixos", "--"]
    }
  }
}

Option 3: Docker

Install MCP Server

config.json
{
  "mcpServers": {
    "nixos": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "ghcr.io/utensils/mcp-nixos"]
    }
  }
}

Your AI now has access to real NixOS data instead of making things up. You're welcome.

Option 4: HTTP (Remote MCP)

FastMCP supports running this server over HTTP at a URL (the MCP endpoint defaults to /mcp).

bash
# Run an HTTP MCP server at http://127.0.0.1:8000/mcp
MCP_NIXOS_TRANSPORT=http MCP_NIXOS_HOST=127.0.0.1 MCP_NIXOS_PORT=8000 mcp-nixos

STDIO (default):

bash
MCP_NIXOS_TRANSPORT=stdio mcp-nixos

Custom path:

bash
MCP_NIXOS_TRANSPORT=http MCP_NIXOS_PATH=/api/mcp mcp-nixos

Stateless HTTP (disables per-client session state):

bash
MCP_NIXOS_TRANSPORT=http MCP_NIXOS_STATELESS_HTTP=1 mcp-nixos

Option 5: Pi Coding Agent

Pi does not speak MCP natively. Two supported paths:

A. pi-mcp-adapter (recommended — speaks MCP, single source of truth):

bash
pi install npm:pi-mcp-adapter

Then add to ~/.pi/agent/mcp.json:

config.json
{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": ["mcp-nixos"],
      "lifecycle": "lazy"
    }
  }
}

B. Project-local extension (clone + run): this repo ships .pi/extensions/mcp-nixos.ts, auto-loaded when you run pi in the cloned repo. Optional: cd .pi && npm install for editor type resolution. Pi runs it either way.

What Is This?

An MCP server providing accurate, real-time information about:

  • NixOS packages - 130K+ packages that actually exist
  • NixOS options - 23K+ ways to configure your system
  • Home Manager - 5K+ options for dotfile enthusiasts
  • nix-darwin - 1K+ macOS settings Apple doesn't document
  • Nixvim - 5K+ options for Neovim configuration via NuschtOS search
  • NVF - 2.4K+ Neovim options from its published unstable documentation
  • FlakeHub - 600+ flakes from FlakeHub.com registry
  • Noogle - 2K+ Nix functions with type signatures via noogle.dev
  • NixOS Wiki - Community documentation and guides from wiki.nixos.org
  • nix.dev - Official Nix tutorials and guides from nix.dev
  • Package versions - Historical versions with commit hashes via NixHub.io
  • Binary cache status - Check if packages are cached on cache.nixos.org with download sizes
  • Local flake inputs - Explore your pinned flake dependencies directly from the Nix store (requires Nix)

The Tools

Just two. We consolidated 17 tools into 2 because your AI's context window isn't infinite.

~1,030 tokens total. That's it. While other MCP servers are hogging your context like it's Black Friday, we're sipping minimalist tea in the corner. Your AI gets NixOS superpowers without the bloat.

nix - Unified Query Tool

One tool to rule them all:

text
nix(action, query, source, type, channel, limit, version, system)

version and system are only used by action="cache".

ActionWhat it does
searchSearch packages, options, programs, or flakes
infoGet detailed info about a package or option
statsGet counts and categories
browseBrowse Home Manager, Darwin, Nixvim, NVF, or Noogle by prefix (legacy alias: options)
channelsList available NixOS channels
flake-inputsExplore local flake inputs from Nix store
cacheCheck binary cache status for packages
storeRead files or list directories at an explicit /nix/store path (requires Nix)
SourceWhat it queries
nixosPackages, options, programs
home-managerHome Manager options
darwinnix-darwin options
flakesCommunity flakes (search.nixos.org)
flakehubFlakeHub registry (flakehub.com)
nixvimNixvim Neovim configuration options
nvfNVF Neovim configuration options (latest unstable docs)
noogleNix function signatures and docs (noogle.dev)
wikiNixOS Wiki articles (wiki.nixos.org)
nix-devOfficial Nix documentation (nix.dev)
nixhubPackage metadata and store paths (nixhub.io)

NVF results use canonical vim.* option paths. Queries may also use the shorthand programs.nvf.vim.* or the NixOS/Home Manager module path programs.nvf.settings.vim.*; both are normalized automatically.

Examples:

python
# Search NixOS packages
nix(action="search", query="firefox", source="nixos", type="packages")

# Get package info
nix(action="info", query="firefox", source="nixos", type="package")

# Search Home Manager options
nix(action="search", query="git", source="home-manager")

# Browse darwin options
nix(action="browse", source="darwin", query="system.defaults")

# Search Nixvim options
nix(action="search", query="telescope", source="nixvim")

# Get Nixvim option info
nix(action="info", query="plugins.telescope.enable", source="nixvim")

# Search NVF options
nix(action="search", query="vim.languages.nix", source="nvf")

# Get NVF option info using a module wrapper path
nix(action="info", query="programs.nvf.settings.vim.languages.nix.enable", source="nvf")

# Browse NVF options below a prefix
nix(action="browse", query="programs.nvf.vim.languages.nix", source="nvf")

# Search FlakeHub
nix(action="search", query="nixpkgs", source="flakehub")

# Get FlakeHub flake info
nix(action="info", query="NixOS/nixpkgs", source="flakehub")

# Search Noogle for Nix functions
nix(action="search", query="mapAttrs", source="noogle")

# Get Noogle function info
nix(action="info", query="lib.attrsets.mapAttrs", source="noogle")

# Browse Noogle function categories
nix(action="browse", source="noogle", query="lib.strings")

# Search NixOS Wiki
nix(action="search", query="nvidia", source="wiki")

# Get Wiki page info
nix(action="info", query="Flakes", source="wiki")

# Search nix.dev documentation
nix(action="search", query="packaging tutorial", source="nix-dev")

# Search NixHub for package metadata
nix(action="search", query="nodejs", source="nixhub")

# Get detailed package info from NixHub (license, homepage, store paths)
nix(action="info", query="python", source="nixhub")

# Check binary cache status
nix(action="cache", query="hello")

# Check cache for specific version
nix(action="cache", query="python", version="3.12.0")

# Check cache for specific system
nix(action="cache", query="firefox", system="x86_64-linux")

# Get stats
nix(action="stats", source="nixos", channel="stable")

# List local flake inputs (requires Nix)
nix(action="flake-inputs", type="list")

# Browse files in a flake input
nix(action="flake-inputs", type="ls", query="nixpkgs:pkgs/by-name")

# Read a file from a flake input
nix(action="flake-inputs", type="read", query="nixpkgs:flake.nix")

# List or read a store path directly (requires Nix)
nix(action="store", type="ls", query="/nix/store/<hash>-<name>")
nix(action="store", type="read", query="/nix/store/<hash>-<name>/flake.nix")

nix_versions - Package Version History

Find historical versions with nixpkgs commit hashes. Output includes:

  • Package metadata (license, homepage, programs) when available
  • Platform availability per version (Linux/macOS)
  • Nixpkgs commit hash for reproducible builds
  • Attribute path for Nix expressions
python
nix_versions(package, version, limit)

Examples:

python
# List recent versions with metadata
nix_versions(package="python", limit=5)

# Find specific version
nix_versions(package="nodejs", version="20.0.0")

Installation

Read the full README →View source on GitHub →

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Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars
825
Stargazers on the source repository.
Last commit
6d ago
Most recent push to the default branch.
Directory activity
2 views
Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about MCP Nixos

No. The server works on Windows, macOS, and Linux without Nix; local flake input exploration does require Nix.

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Technical Specs & Signals

CategoryšŸ–„ļøOS Automation
PricingFree
More technical detailsExpand ā–¾
TransportSTDIO
RuntimePython
AuthNo auth required
ClientsCursor
Last updatedSep 5, 2026
9/10 checks healthy over the last 31d
Views2
Unique ViewsTotal visits recorded for this listing page on AllMCPs.
Installs0
Installs & Copy ActionsTotal times users copied install commands or configuration snippets for this server.
GitHub stars825
GitHub Star CountTotal stargazers on GitHub representing community popularity (825 stars).
Last commit6d ago
Last Repository CommitThe most recent commit or push recorded for this server's GitHub repository.Last commit on Sep 5, 2026
57Quality signal: Good Ā· 57/100How this signal is calculated ā–¾
Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20
Documentation & tools23/30
Adoption & activity10/15
Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 21d ago via OSV.dev Ā· mcp-nixos (PyPI)

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