API rate limiting with sliding window, token bucket, and per-user quotas.
Any service or user making API requests subject to rate limits.
Distributes traffic across API servers. Adds client IP headers.
Middleware checking request count against limits. Returns 429 if exceeded.
Sliding window counters per API key. Lua scripts for atomic increment + expire.
Processes allowed requests. Returns rate limit headers (X-RateLimit-*).
Rate limit tiers: free (100/hr), pro (10K/hr), enterprise (custom). Hot-reloaded.
Tracks request volumes, throttled requests, top consumers for billing.
Explore this architecture with animated data flows, node auditing, and AI-powered analysis.
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