How to Build a Custom MCP Server with TypeScript - A Handbook for Developers
by freeCodeCamp (Sumit Saha)
Build a real MCP server that feeds Google Calendar to your AI.
Overview
Written by Sumit Saha for freeCodeCamp, this handbook explains the Model Context Protocol and then walks through building a custom MCP server in TypeScript that integrates with the Google Calendar API to provide live data to AI applications like Claude and Cursor. It breaks down the terminology (Model, Context, Protocol), explains why MCP matters for universal data access, compares RAG versus MCP (static knowledge retrieval versus real-time data streaming), and covers MCP architecture (hosts, clients, servers, and data sources). The technical portion is step by step: creating an MCP server with the TypeScript SDK, integrating the Google Calendar API, registering the server in the Cursor editor, and testing calendar queries through AI chat, emphasizing reusable, standardized connectors between real-world data and AI apps.
At a Glance
- Topic
- MCP
- Level
- Beginner
- Format
- Tutorial
- Cost
- Free
- Duration
- ~30 min read
- Provider
- freeCodeCamp (Sumit Saha)
- Hands-on
- Yes — code/exercises
- Certificate
- None
What You’ll Learn
- ✓Building a custom MCP server in TypeScript with the SDK
- ✓Integrating a real external API (Google Calendar)
- ✓Registering and testing the server in Cursor
- ✓How MCP differs from RAG for live data
Highlights
- •Concrete, real-data project (Google Calendar)
- •Clear RAG-vs-MCP framing
- •Free and beginner-friendly
Who It’s For
Best For
- ✓Developers who prefer a hands-on, project-based intro
- ✓TypeScript devs wiring MCP into Claude or Cursor
Prerequisites
- •Basic TypeScript and Node.js
- •A Google account for the Calendar API
FAQ
What is How to Build a Custom MCP Server with TypeScript - A Handbook for Developers?
A freeCodeCamp handbook that builds a custom TypeScript MCP server integrating Google Calendar for AI tools like Claude and Cursor. For developers who learn best by shipping a concrete, real-data project.
Is How to Build a Custom MCP Server with TypeScript - A Handbook for Developers free?
How to Build a Custom MCP Server with TypeScript - A Handbook for Developers is free to access.
What level is How to Build a Custom MCP Server with TypeScript - A Handbook for Developers for?
How to Build a Custom MCP Server with TypeScript - A Handbook for Developers is aimed at a beginner audience. Recommended background: Basic TypeScript and Node.js, A Google account for the Calendar API.
How long does How to Build a Custom MCP Server with TypeScript - A Handbook for Developers take?
Expect roughly ~30 min read. Most learners work through it at their own pace.
What will I learn from How to Build a Custom MCP Server with TypeScript - A Handbook for Developers?
You'll learn: Building a custom MCP server in TypeScript with the SDK; Integrating a real external API (Google Calendar); Registering and testing the server in Cursor; How MCP differs from RAG for live data.