How to Build an MCP Server from Scratch

Building MCP servers from scratch gives you complete control and understanding of the protocol.

Architecture Overview

An MCP server consists of three main components: the transport layer, the tool registry, and the resource manager.

TypeScript Implementation

import { Server } from "@modelcontextprotocol/sdk/server/index.js";

const server = new Server({
  name: "my-mcp-server",
  version: "1.0.0",
}, {
  capabilities: {
    tools: {},
    resources: {}
  }
});