Web basics

Endpoint

A single URL you hit to do one specific thing in an API.

An endpoint is one address in an API where a specific action lives — like `/users/123` to fetch a user or `/checkout` to start a payment. If an API is a building, endpoints are the individual doors, each leading to one room. When you build your own backend, you're creating endpoints (often as 'routes' or 'API routes' in Next.js), and when something breaks, knowing exactly which endpoint returned the error is half the debugging battle.