Zig Docs MCP

MCP server providing up-to-date Zig documentation and builtin functions.

Installation

Claude Code

claude mcp add zig-docs npx -y zig-docs-mcp --version master --update-policy manual

Claude Desktop

Add to your MCP configuration:

{
  "mcpServers": {
    "zig-docs": {
      "command": "npx",
      "args": ["-y", "zig-docs-mcp", "--version", "master", "--update-policy", "manual"]
    }
  }
}

Tools

• list_builtin_functions - Lists all available Zig builtin functions. Builtin functions are provided by the compiler and are prefixed with '@'. The comptime keyword on a parameter means that the parameter must be known at compile time. Use this to discover what functions are available, then use 'get_builtin_function' to get detailed documentation.
• get_builtin_function - Search for Zig builtin functions by name and get their documentation, signatures, and usage information. Returns all matching functions ranked by relevance.

Commands

The CLI provides flexible options for version control and update management:

# Start MCP server with defaults (master branch, manual updates)
zig-docs-mcp

# Use specific Zig version
zig-docs-mcp --version 0.13.0

# Enable automatic daily updates
zig-docs-mcp --update-policy daily

# Update documentation without starting server
zig-docs-mcp update --version 0.14.1

Version options:

• master (default) - Latest development version from Zig's master branch
• 0.13.0, 0.12.0, etc. - Specific Zig release versions

Update policies:

• manual (default) - No automatic updates, manual control only
• daily - Check for documentation updates once per day
• startup - Update documentation every time the server starts

Cache

Documentation is fetched from ziglang.org and cached in platform-specific directories:

• Linux: ~/.cache/zig-docs-mcp/
• macOS: ~/Library/Caches/zig-docs-mcp/
• Windows: %LOCALAPPDATA%\zig-docs-mcp\