ExpressJS MCP

import express from "express"; import { describe, expect, it } from "vitest"; import { RouteIntrospector } from "../src/routeIntrospector"; describe("RouteIntrospector", () => { it("discovers routes and methods", () => { const app = express(); app.get("/hello", (_req, res) => res.send("ok")); // Express lazily creates the router, so we need to trigger it // by calling app.handle or by accessing the internal router const router = (app as unknown as { _router?: unknown })._router; if (!router) { // Force router creation by calling lazyrouter (app as unknown as { lazyrouter: () => void }).lazyrouter(); } const ri = new RouteIntrospector(app); const routes = ri.listRoutes(); expect(routes.some((r) => r.method === "GET" && r.path === "/hello")).toBe( true, ); }); });