How I Protected My Express API from Spam and High AI Costs Using Redis
When I was building my backend API, I realized a big problem: anyone could spam my endpoints. If a user repeatedly reloads a page or hits an endpoint calling an external AI service, it can crash the server or run up high API costs. To fix this, I added Rate Limiting . Here is why I used Redis for it and how I set it up. The Problem with Simple In-Memory Limiters At first, I thought about saving…
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