eff mcp for Claude Code

io.github.mrfentmen/eff-mcp

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

client:Claude Code transport:stdio runtime:npm

Install eff mcp in Claude Code

run in your project directory

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

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