💻Client
🗄️Server
GET /api/data
{JSON}
🌐
RESTGraphQLWebSocketsAuth
Connect your apps to the world. Master REST APIs, GraphQL, gRPC, authentication, and best practices for building robust API integrations.
Learn APIs
Master APIs from fundamentals to advanced concepts. Learn REST APIs, GraphQL, WebSockets, Fetch API, authentication methods, error handling, and industry best practices.
10
Topics
50+
Code Examples
~4 hrs
Reading Time
🌐 What You'll Learn
- ✓ API Fundamentals: What APIs are and how they enable communication
- ✓ REST APIs: RESTful principles, HTTP methods, and endpoints
- ✓ Fetch API: Making HTTP requests in JavaScript
- ✓ GraphQL: Flexible data fetching with queries and mutations
- ✓ WebSockets: Real-time bidirectional communication
- ✓ Authentication: API keys, JWT, and OAuth 2.0
- ✓ Error Handling: Graceful error management and retries
- ✓ Best Practices: Rate limiting, caching, and security
Topics
Lesson 1
Beginner
API Fundamentals
Understanding what APIs are, how they work, and why they're essential in modern development
15 minFull Guide
Lesson 2
Beginner
REST APIs
Learn RESTful API design principles, HTTP methods, endpoints, and status codes
25 minFull Guide
Lesson 3
Beginner
Fetch API & HTTP Requests
Master the Fetch API for making HTTP requests in JavaScript with practical examples
30 minFull Guide
Lesson 4
Intermediate
GraphQL
Learn GraphQL queries, mutations, and subscriptions for flexible data fetching
35 minFull Guide
Lesson 5
Intermediate
WebSockets & Real-Time APIs
Build real-time applications with WebSockets, Server-Sent Events, and Socket.io
25 minFull Guide
Lesson 6
Intermediate
API Authentication
Implement secure API authentication with API keys, JWT tokens, and OAuth 2.0
30 minFull Guide
Lesson 7
Intermediate
API Error Handling
Handle API errors gracefully with proper error codes, retries, and fallback strategies
20 minFull Guide
Lesson 8
Advanced
API Best Practices
Learn rate limiting, caching, security, versioning, and API design patterns
25 minFull Guide
Lesson 9
Advanced
gRPC & Protocol Buffers
Learn gRPC for high-performance, typed RPC communication with Protocol Buffers
30 minFull Guide
Lesson 10
Intermediate
tRPC - End-to-End Type Safety
Build fully typesafe APIs without schemas or code generation using tRPC
25 minFull Guide
💡 Why Learn APIs?
APIs are the backbone of modern web development, enabling applications to communicate and share data:
- 🔗 Connect Services: Integrate with third-party services and databases
- 📱 Build Apps: Power web, mobile, and desktop applications
- ⚡ Real-Time Features: Enable live updates and notifications
- 💼 Career Essential: Required skill for all modern developers