Build an MCP Server with TypeScript: 2026 Tutorial

The Model Context Protocol has crossed 97 million monthly SDK downloads and over 10,000 public server implementations. Every major AI platform — Claude, Cursor, Windsurf, OpenAI — now speaks it natively. If you build a TypeScript MCP server today, your tools work everywhere those clients run. This tutorial walks through building a working MCP server from scratch, covering tools, resources, the stdio transport, and how to wire it into Claude Desktop. Effloow Lab ran this exact build in a local sa