How to Build Your First MCP Server in 10 Minutes

You keep hearing about MCP servers but every tutorial throws you into multi-agent swarms and complex architectures. Here's the simplest possible MCP server -- one file, one tool, fully runnable in 10 minutes. The Code Create a new project and install the SDK: mkdir my-mcp-server && cd my-mcp-server npm init -y npm install @modelcontextprotocol/sdk zod Create server.ts : import { McpServer } from " @modelcontextprotocol/sdk/server/mcp.js " ; import { StdioServerTransport } from " @modelcontextprotocol/sdk/server/stdio.js " ; import { z } from " zod " ; const server = new McpServer ({ name : " weather-server " , version : " 1.0.0 " , }); server . registerTool ( " get-weather " , { title : " Get Weather " , description : " Get current weather for a city " , inputSchema : z . object ({ city : z . string (). describe ( " City name " ), }), }, async ({ city }) => { const res = await fetch ( `https://wttr.in/ ${ encodeURIComponent ( city )} ?format=j1` ); const data = await res . json (); con