When developing web apps or APIs, it’s critical to prevent users from overwhelming your server. That’s where rate limiting comes in. In this guide, we’ll build a custom rate limiter in Node.js using Redis—no libraries, no magic, just code you control and understand.
- How to use Redis to count and throttle requests
- How to implement reusable middleware in Express
- How to rate limit by IP or API key
- Why this method is better for learning and customization