rime

A minimal Model Context Protocol (MCP) server for Nix tooling, written in Rust.

Tools

• nix_evaluate: Evaluate a Nix expression.
• nix_log: Get build log for an installable.
• nix_packages_search: Search packages in an installable.
• nix_packages_why_depends: Show why a package depends on another.
• nix_flakes_show: Show a flake's outputs.
• nix_flakes_metadata: Show flake metadata.
• nix_config_check: Run nix config check.
• nix_config_show: Run nix config show.
• nix_manual_list: List Markdown files in the Nix manual.
• nix_manual_read: Read a Markdown file from the Nix manual.
• nixpkgs_options_search: Search for Nixpkgs options in nixpkgs for a specific ref.

• nixos_wiki_search: Search the NixOS wiki.
• nixos_wiki_read: Read a page from the NixOS wiki.
• nixos_channels: List available NixOS channels with their status.

• home_manager_options_search: Search Home Manager options.

• nvf_options_search: Search nvf options for a specific ref.
• nvf_manual_list: List files in the nvf manual for a specific ref.
• nvf_manual_read: Read a file from the nvf manual for a specific ref.

• nixhub_package_versions: Get version history for a package via nixhub.

• manix_search: Search docs with manix.

Getting Started

Prerequisites

Ensure nix is installed and available on your PATH.

Build & Run

# Build
nix build .#rime

# Run (Stdio)
./result/bin/rime stdio

# Run (HTTP)
./result/bin/rime http --host 127.0.0.1 --port 8080

Usage

Add to ~/.codex/config.toml:

[mcp_servers.rime]
command = "/path/to/rime"
args = ["stdio"]

Add to ~/.config/opencode/config.json:

{
  "mcp": {
    "rime": {
      "type": "local",
      "command": ["/path/to/rime", "stdio"],
      "enabled": true
    }
  }
}

claude mcp add rime -- /path/to/rime stdio

Add to ~/.gemini/settings.json:

{
  "mcpServers": {
    "rime": {
      "command": "/path/to/rime",
      "args": ["stdio"]
    }
  }
}

Add to .vscode/mcp.json:

{
  "servers": {
    "rime": {
      "command": "/path/to/rime",
      "args": ["stdio"]
    }
  }
}

Add to settings.json:

{
  "context_servers": {
    "rime": {
      "command": "/path/to/rime",
      "args": ["stdio"]
    }
  }
}

Credits

• manix
• nixhub
• nvf
• mcp-nixos