nix mcp for Claude Code

io.github.mrfentmen/nix-mcp

Nix MCP: 20 real tools to read, check, lint, scaffold, build and run Nix code.

client:Claude Code transport:stdio runtime:npm

Install nix mcp in Claude Code

run in your project directory

claude mcp add nix-mcp -- npx -y @mrfentmen/nix-mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs