SMRTR ProgrammingMay 20, 2026GitConnected

How to Build a Reliable Webhook System in Python — Sending, Receiving, and Not Losing Events

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A team spent three painful weeks learning webhook reliability the hard way after integrating with a payment provider. Week one: 23 lost events due to premature acknowledgment. Week two: duplicate orders from slow response times triggering retries. Week three: the real solution — signature verification, async processing, idempotency, and a dead letter queue. Now it's been rock-solid for over a year.

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