MCP

Tools get all the attention in MCP tutorials, but Resources are where you give the model read access to live data — files, databases, configs — without making it call a tool every time.

Exposing an MCP server beyond localhost means thinking about who can call it. This walkthrough adds API key authentication to a TypeScript MCP server without over-engineering it.

A hands-on guide to writing a Model Context Protocol server in TypeScript — exposing tools an AI assistant can actually call, and wiring it into Claude and other MCP clients.