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How Redis-Backed Sliding Window Rate Limiting Protects Laravel APIs from Abuse

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B2B SaaS APIs face constant threats from scrapers, rogue scripts, and accidental traffic spikes that can overwhelm servers and take platforms offline. Traditional fixed-window rate limiting has a known flaw where clients can double their allowed requests by timing bursts across window boundaries. Laravel's RateLimiter facade, when paired with a Redis cache driver, implements a sliding window algorithm that closes this loophole with microsecond precision. Developers can define tiered limits in a central service provider, granting higher throughput to enterprise users while strictly throttling standard accounts. Critical heavy endpoints, such as PDF exports, can be assigned separate, stricter limiters to prevent resource exhaustion independent of global API caps.

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How Redis-Backed Sliding Window Rate Limiting Protects Laravel APIs from Abuse · ShortSingh