API security is critical for protecting your users and data. This guide covers essential security measures that every backend developer should implement to build secure, production-ready APIs.
Security Middleware Stack
javascript
const helmet = require('helmet');
const rateLimit = require('express-rate-limit');
const cors = require('cors');
// Security headers
app.use(helmet());
// Rate limiting
app.use(rateLimit({
windowMs: 15 * 60 * 1000, // 15 minutes
max: 100, // limit each IP to 100 requests
}));
// CORS configuration
app.use(cors({
origin: process.env.ALLOWED_ORIGINS?.split(','),
credentials: true,
}));Input Validation with Zod
typescript
import { z } from 'zod';
const userSchema = z.object({
email: z.string().email(),
password: z.string().min(8).regex(/[A-Z]/).regex(/[0-9]/),
name: z.string().min(2).max(50),
});
// Validate request body
const validated = userSchema.safeParse(req.body);
if (!validated.success) {
return res.status(400).json({ errors: validated.error.issues });
}99%Attacks prevented
OWASPCompliant
A+Security rating
24/7Protection
