nix mcp for Windsurf

io.github.mrfentmen/nix-mcp

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

client:Windsurf transport:stdio runtime:npm

Install nix mcp in Windsurf

~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json

{
  "mcpServers": {
    "nix-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/nix-mcp"
      ]
    }
  }
}

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs