MCP Zig Server

MCP server providing Zig language features (completions, hover info, definitions, references) via integration with the Zig Language Server (zls).

Works with any MCP-compatible client: AI assistants, IDEs, or coding agents that support the Model Context Protocol.

Quick Setup

1. Install zls

# macOS/Linux
brew install zls

# Windows
scoop install zls

# Or download binary: https://github.com/zigtools/zls/releases

2. Configure Your MCP Client

Add to your MCP settings file:

{
  "mcpServers": {
    "mcp-zig": {
      "command": "npx",
      "args": ["-y", "@dungngo4520/mcp-zig"],
      "env": {
        "WORKSPACE_ROOT": "/path/to/your/zig/project"
      }
    }
  }
}

Common config locations:

• macOS: ~/Library/Application Support/<client>/config.json
• Windows: %APPDATA%\<client>\config.json
• Linux: ~/.config/<client>/config.json

Replace <client> with your MCP client's name. Check your client's documentation for exact path.

3. Restart Your MCP Client

You'll have access to 4 new tools:

• zig_complete - Code completions
• zig_hover - Symbol information
• zig_goto_definition - Jump to definitions
• zig_find_references - Find all usages

Usage

Ask natural language questions about your Zig code:

• "What does this function do?"
• "Show me completions here"
• "Where is this defined?"
• "Find all usages of this symbol"

Your AI assistant automatically chooses the right tool.

Troubleshooting

Tools not showing up?

• Verify zls is installed: zls --version
• Check the config file path for your MCP client
• Restart your MCP client after config changes
• Make sure WORKSPACE_ROOT points to a valid Zig project

Contributing

git clone https://github.com/dungngo4520/mcp-zig.git
cd mcp-zig
npm install
npm run build

License

MIT