MCP Loader
Drop .ts or .js files in a folder. They become MCP tools. That's it.
Quick Start
// .claude/tool/math.ts
import { tool } from "mcp-loader";
export const add = tool({
description: "Add two numbers",
args: {
a: tool.schema.number(),
b: tool.schema.number(),
},
execute: ({ a, b }) => a + b,
});Add to .mcp.json: ``json { "mcpServers": { "tools": { "command": "npx", "args": ["mcp-loader", ".claude/tool"] } } } ``
Done. Tools work in Claude.
Install
Global install: ``bash npm install -g mcp-loader ``
Or as a dev dependency: ``bash npm install --save-dev mcp-loader ``
Or just use npx (no install): ``bash npx mcp-loader .claude/tool ``
Features
- Hot reload - Save file, tool updates (disable with
MCP_NO_HOT_RELOAD=true) - Multiple tools per file - Use named exports
- MCP context - Second param in execute has request info
- TypeScript - Full type safety
Note
After changing tools, refresh with /mcp in Claude Code or restart Claude Desktop.
License
MIT
