MCP Servers Nix

A Nix-based configuration framework for deploying MCP servers with ready-to-use packages, supporting modular and reproducible builds.

GitHub

mcp-servers-nix

A Nix-based configuration framework for Model Control Protocol (MCP) servers with ready-to-use packages.

Overview

This repository provides both MCP server packages and a Nix framework for configuring and deploying MCP servers. It offers a modular approach to configuring various MCP servers with a consistent interface.

Features

  • Modular Configuration: Define and combine multiple MCP server configurations
  • Reproducible Builds: Leverage Nix for reproducible and declarative server setups
  • Pre-configured Modules: Ready-to-use configurations for popular MCP server types
  • Security-focused: Better handling credentials and sensitive information through envFile and passwordCommand, with pinned server versions
  • Framework Support: Integrates with Flakes, flake-parts, devenv, and Home Manager

Quick Start

Run an MCP server directly:

nix run github:natsukium/mcp-servers-nix#mcp-server-fetch

Generate a configuration file with mkConfig:

# config.nix
let
  pkgs = import <nixpkgs> { };
  mcp-servers-nix = import (fetchTarball
    "https://github.com/natsukium/mcp-servers-nix/archive/main.tar.gz") { inherit pkgs; };
in
mcp-servers-nix.lib.mkConfig pkgs {
  programs.filesystem = {
    enable = true;
    args = [ "/path/to/allowed/directory" ];
  };
}

nix-build config.nix && cat result

{
  "mcpServers": {
    "filesystem": {
      "command": "/nix/store/7b4ancp3cns9lkkybd090qzr0hah5qq0-mcp-server-filesystem-2025.12.18/bin/mcp-server-filesystem",
      "args": [ "/path/to/allowed/directory" ]
    }
  }
}

The output format adapts to the flavor option — see Supported Flavors below.

Supported Flavors

FlavorKeyTypical FileClient
claudemcpServersclaude_desktop_config.jsonClaude Desktop
claude-codemcpServers.mcp.jsonClaude Code
vscodemcp.serverssettings.jsonVS Code
vscode-workspaceservers.vscode/mcp.jsonVS Code (workspace)
codexmcp_servers.mcp.tomlCodex CLI
opencodemcpopencode.jsonOpenCode
zedcontext_servers(varies)Zed

Available Modules

Examples

Check the examples directory for complete configuration examples:

Real World Examples

Check out GitHub search results for examples of how others are using mcp-servers-nix in their projects.

Documentation

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

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