📍 Chapter Overview
🔌
Foundations
🔁
REST & HTTP
📦
Data Formats
🔑
Authentication
🔔
Integration
Key Topics
What Is an API
The contract that lets two programs exchange data safely
REST & HTTP Methods
GET, POST, PUT, DELETE — the verbs of the web
JSON
The universal data format APIs speak
Status Codes
200 OK, 404 Not Found, 500 Error — what responses mean
API Keys & OAuth
How APIs know who's calling and what they're allowed to do
Webhooks
Reverse APIs — servers that call you when something happens
Interactive Concept
The API Request/Response Cycle
Every tap in a modern app triggers this cycle: your app asks an API, the API asks its data sources, and a structured JSON answer travels back
API Articles
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