npm install mcp-server-plus zod

import { z } from "zod";
import { createServer, toolResult } from "mcp-server-plus";

const weatherTool = {
  description: "Get weather",
  inputSchema: { city: z.string() },
  async handler({ city }: { city: string }) {
    return toolResult(`Weather in ${city}: sunny`);
  },
};

const server = createServer({
  name: "demo",
  version: "1.0.0",
});

server.tool("weather", weatherTool);

await server.start(); // stdio

npx mcp-server-plus init my-weather-server
cd my-weather-server
npm install
npm start

import { callTool, expectText } from "mcp-server-plus/testing";

server.tool("weather", weatherTool);
server.prompt("greet", {
  description: "Greeting",
  arguments: [{ name: "name", required: true }],
  handler: async ({ name }) => ({
    messages: [
      { role: "user", content: { type: "text", text: `Hello ${name}` } },
    ],
  }),
});
server.resource("memo://hello", {
  mimeType: "text/plain",
  handler: async (uri) => ({
    contents: [{ uri: uri.href, text: "Hello", mimeType: "text/plain" }],
  }),
});

const server = createServer({
  name: "secure",
  version: "1.0.0",
  // MCP_API_KEY is the expected secret only. Callers must still send meta.apiKey.
  auth: { apiKey: process.env.MCP_API_KEY, required: true },
});

server.tool("deploy", {
  roles: ["admin"],
  scopes: ["deploy"],
  handler: async () => toolResult("deployed"),
});

server.use(async (ctx, next) => {
  const started = Date.now();
  try {
    return await next();
  } finally {
    ctx.log.info("tool timing", ctx.toolName, Date.now() - started);
  }
});

console.log(server.metricsSnapshot());

{
  "mcpServers": {
    "demo": {
      "command": "node",
      "args": ["/path/to/server/src/index.js"]
    }
  }
}