🔒 Paid
Rate-Limit Failure
Outbound calls to your payment-verification provider have exceeded its allowed request rate, and the provider has begun returning 429 responses. Your client is retrying failed requests immediately with no backoff, and the retry queue is growing fast. Diagnose the throttling and restore healthy throughput before the retry storm extends the provider's penalty window indefinitely.
- Difficulty
- Intermediate
- Expected Time
- ~12 min
- Category
- API & Traffic
Skills
- Diagnosing rate-limit violations and throttling
- Exponential backoff and jitter
- Proactive client-side rate limiting
- Recognizing plausible-but-harmful mitigations
System Architecture
- Client Service
- Token Bucket Limiter
- Payment Verification API
- Retry Queue
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