Secure API Design and Rate Limiting
Learn to protect SaaS APIs against abuse and attack using input validation, rate limiting, secure headers, and defense against common web vulnerabilities.
APIs as the Attack Surface
For a SaaS product, the API is the front door. Every endpoint is a potential entry point for attackers.
Securing APIs goes beyond login: it covers validation, abuse prevention, and protecting against known attack classes.
Validate All Input
Never trust client input. Validate and sanitize every field: type, length, format, and range.
Reject anything unexpected early, before it reaches business logic or the database.
function validateEmail(input) {
const ok = /^[^@\s]+@[^@\s]+\.[^@\s]+$/.test(input);
if (!ok) throw new Error('Invalid email');
return input.toLowerCase();
}All lessons in this course
- Authentication & Authorization
- Data Encryption & Privacy
- Compliance & Regulatory Standards
- Secure API Design and Rate Limiting