How Idempotency Keys Save Your API from Double Charges
from The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs Hosted by Fexingo
In this episode of The API Podcast, Lucas and Luna dig into idempotency keys — the unsung heroes of reliable API design. You've probably used them without knowing: every time a payment gateway tells you to retry with the same key, that's idempotency at work. Lucas explains how idempotency keys work, why they matter beyond payments, and how Stripe made them a de facto standard. Luna brings up a real-world example: a double charge that happened on a ride-sharing app, and how the lack of idempotency caused it. They also cover the HTTP layer — how idempotent methods like PUT and DELETE fit in, and where POST and PATCH get tricky. If you're building or consuming APIs, this episode gives you one concrete pattern to steal: always send an idempotency key on every state-changing request. Tune in for a clear, no-fluff breakdown of a concept that keeps your data consistent. #IdempotencyKeys #APIDesign #StripeAPI #HTTPMethods #PaymentAPIs #ReliableAPIs #RetryStrategies #POSTandPATCH #PUTandDELETE #DataConsistency #DistributedSystems #DeveloperTips #APIBestPractices #TechPodcast #FexingoBusiness #BusinessPodcast #SoftwareEngineering #APISecurity Keep every episode free: buymeacoffee.com/fexingo
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