Building a Custom MCP Server with Node.js

Ever wished your AI assistant actually knew your stuff? Your files, your schedule, or even a custom data source? That's exactly what the Model Context Protocol (MCP) makes possible.MCP is an open standard for connecting AI assistants like Claude to external data sources and tools. Think of it like a USB port for AI - a single, standardised connector that works with any compatible device. Build the server once, plug it into any MCP-compatible client.In this guide, we'll build a custom MCP server from scratch using Node.js. The example is deliberately practical: a bin collection reminder system. Simple enough to grasp quickly. Complex enough to cover every core concept you'll need.What is the Model Context Protocol?MCP gives AI assistants a common language for talking to the outside world. Instead of every tool needing its own bespoke integration, MCP provides a shared standard.Your MCP server exposes "tools" - functions that AI Assistants can call. The server does the work (reading…