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API Request Throttling Patterns

Throttle gracefully

Implementing throttling uses algorithms like token/leaky buckets or fixed windows, differentiated by key, with Retry-After headers and circuit breakers to protect services while guiding clients.

Pick an Algorithm

Token/leaky bucket for smoother flow; fixed window for simplicity.

Key and Enforce

Throttle per key/IP/user; add circuit breakers for spikes.

Signal Clients

Return 429 with Retry-After; document backoff expectations.

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