APIs

Designing, consuming and testing APIs — REST, JSON, auth, versioning and the tools that make it painless.

beginner~20 hours12 topics~18h of lessonsRoadmap Level 4

The web is where most CS jobs start; shipping a real full-stack app proves you can build end to end.

RECOMMENDED BEFORE THIS
○ JavaScript

These are suggested first. You can still open any topic — this only helps you pick an order.

Prerequisites:JavaScript
Learning Path
07 stages
12 topics · 7 stages0/12 completed
01

Fundamentals

Start from zero. Build the vocabulary.

What is an API?~30 minbeginnerJSON and HTTP Fundamentals~45 minbeginner
02

Core Concepts

The ideas you cannot skip.

REST Design Principles~75 minintermediateAPI Authentication~75 minintermediateConsuming APIs in Code~75 minbeginner
03

Intermediate

Connect ideas and go deeper.

Documentation and Tooling~60 minintermediateError Design and Pagination~60 minintermediate
04

Advanced

Beyond the basics.

GraphQL vs REST~75 minadvancedWebhooks and Event-driven APIs~60 minadvanced
05

Practice

Solve problems until it sticks.

Practice: Build and Consume~180 minintermediate
06

Projects

Apply everything in real work.

Project: API Integration (Weather/Maps/News)~300 minintermediate
07

Interview Prep

Convert knowledge into offers.

API Interview Questions~60 minintermediate