Upstash Ratelimit

Overview

@upstash/ratelimit implements distributed rate limiting on top of Upstash Redis. Because state lives in Redis, every instance of a serverless function or edge worker shares the same counters, which an in-memory limiter cannot do. It ships three algorithms (fixed window, sliding window, token bucket), per-identifier keys, optional in-memory blocking of already-limited identifiers, and optional analytics.

When to Use This Skill