Build MCP Client from Scratch in Javascript | MCP Internals | Raw JSON-RPC Protocol Implementation

In this video, I will show you how to build an MCP Client from scratch in Javascript/NodeJS. That means, we won't use the official sdk. Instead, we'll implement the protocol using JSON-RPC spec in it's raw form 🔥🔥. This helps you understand how the MCP client-server communication happens behind the scenes. If you love learning about the deep internals of protocols, this video is for you. 👉 It is recommended to watch the - "Building an MCP Server" video first - https://youtu.be/H4Odxtncxrk 👉 You may also watch the - "Build an AI Agent from scratch" video to understand how the agentic chat-loop works in JS - https://youtu.be/Uq9WlPnT5iw 👉 Github Source Code - https://github.com/meanands/mcp-client-raw-json-rpc-implementation Bookmarks for this video 00:00 Introduction 00:37 What is MCP 01:55 MCP Architecture 05:12 MCP Lifecycle 06:59 MCP Lifecycle Steps 14:06 Setup the IDE 15:10 Creating LLM Chatbot 25:12 Adding MCP Support to Chatbot 48:25 Testing the chatbot with MCP Support Follow me for more content on software engineering, system design and AI related content. Twitter - https://twitter.com/anandrmedia Website - https://anands.me If you like my video, consider subscribing to my Youtube channel Thanks for watching, 👋 Anand