Loopwatch Express Middleware

This package provides an Express middleware to intercept MCP tool call requests and enforce policies via Loopwatch Core.

Installation

cd loopwatch-middleware
npm install

Usage

import express from 'express';
import { mcpInterceptor } from 'loopwatch-middleware';

const app = express();
app.use(express.json());

// Apply the middleware to your MCP tool invocation route
app.post('/tools',
  mcpInterceptor({ coreUrl: 'http://localhost:3000' }),
  (req, res) => {
    // Your tool execution logic
    res.json({ result: 'Tool executed' });
  }
);

Options

• coreUrl: Base URL of the Loopwatch Core service (e.g., http://localhost:3000).
• timeoutMs: HTTP request timeout in milliseconds (default: 5000).

Build

npm run build

Development

npm run dev