Security
API Security Checklist 2025: Auth, Rate Limiting & Input Validation That Actually Holds
The API security mistakes that get apps breached — and exactly how to fix them. Covers JWT auth, OAuth flows, rate limiting strategies, and input validation with real code examples.
- Published
- Reading time
- 9 min read
- Written by
- Rakesh · DEVMANUSH RAKY
In an era of sophisticated automated attacks, securing your API is paramount. A single vulnerable endpoint can compromise your entire system.
Authentication vs Authorization
Authentication confirms who the user is (JWT, OAuth), but Authorization confirms what they are allowed to do. Never rely on the client to enforce permissions.
Rate Limiting and Throttling
Protect your resources from brute force attacks and DDoS by implementing strict rate limiting on every sensitive endpoint. Use Upstash or Redis for edge-compatible rate limiting.
- Use HTTPS everywhere without exception.
- Sanitize all inputs to prevent SQL injection and XSS.
- Implement a strict Content Security Policy (CSP).
- Security
- API
- Authentication
- Best Practices
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