From basics to advanced patterns, build and consume web APIs with practical examples and code-first tutorials.
APIs (Application Programming Interfaces) are the foundation of web communication between systems, applications, and services. Learn to create and consume RESTful endpoints, GraphQL services, and more.
// Example GET Request with Fetch
fetch('https://api.example.com/users')
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));
api-example.js
REST APIs use standard HTTP methods (GET, POST, PUT, DELETE) to interact with resources. Learn how to design endpoints, handle JSON data, and implement CRUD operations.
POST /api/books
Content-Type: application/json
{'{'
"title": "Web Development",
"author": "Jane Doe"
'}'}
GraphQL allows for precise data queries and mutations. Understand how to define schemas, resolve fields, and handle complex queries with this modern API approach.
query {'{'
book(id: "1") {'{'
title
author
'}'
'}'}
Secure APIs with JWT tokens, OAuth 2.0, and API key validation. Learn best practices for authentication, role-based access control, and rate limiting.
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpX...
Content-Type: application/json
Create a simple Express server to expose an API endpoint. This example demonstrates a basic GET route and response.
// server.js
const express = require('express');
const app = express();
app.get('/api/data', (req, res) => {'{'
res.json({'{'
message: "Success",
timestamp: new Date()
'}'
});
app.listen(3000, () => console.log('Running on port 3000'));
}
server.js
Implement pagination for large datasets with limit/offset or cursor-based approaches to improve performance and usability.
Create event-driven architectures using webhooks to receive real-time notifications from external services.
Design backward-compatible APIs using URL or header-based versioning to manage changes without breaking clients.
Protect your APIs from abuse by implementing request rate limits with token bucket or leaky bucket algorithms.
Our comprehensive tutorials walk you through API design, security, and integration patterns that scale.
💡 Start Building Real APIs