Express MCP Server Echo

import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js"; import { z } from "zod"; // Create a new MCP server function createServer() { const server = new McpServer({ name: "Echo", version: "1.0.0" }); server.resource( "echo", new ResourceTemplate("echo://{message}", { list: undefined }), async (uri, { message }) => ({ contents: [{ uri: uri.href, text: `Resource echo: ${message}` }] }) ); server.tool( "echo", { message: z.string() }, async ({ message }) => ({ content: [{ type: "text", text: `Tool echo: ${message}` }] }) ); server.prompt( "echo", { message: z.string() }, ({ message }) => ({ messages: [{ role: "user", content: { type: "text", text: `Please process this message: ${message}` } }] }) ); return server; } export { createServer };