Unlike client-server, the three-tier application model has aged quite gracefully and is now used to provide API services in addition to web pages.

Client-Server Architecture: MCP operates on a client-server model where the client sends requests, and the server processes these requests using LLMs and external tools.

Learn how to build a custom MCP client with Gemini 2.5 Pro. Step-by-step guide to scalable, user-friendly communication solutions.

The Model Context Protocol aims to standardize the connection of external sources to LLMs. A TypeScript example demonstrates its use.