EPISODE · Jun 10, 2026 · 10 MIN
How APIs Handle Idempotency Without Double Charges
from The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs · host Fexingo
Lucas and Luna dive deep into API idempotency, the unsung hero preventing double charges and duplicate actions in distributed systems. They break down how Stripe's idempotency keys work, why the concept is tougher than it sounds, and what happens when idempotency fails. Using concrete examples from payment APIs and order systems, they explain the trade-offs between strict and loose idempotency, and why idempotency is becoming a design requirement for any API that mutates state. No prior episode has covered idempotency directly, and it's a concept every developer building modern APIs needs to understand. #APIIdempotency #StripeAPI #IdempotencyKeys #DistributedSystems #PaymentAPIs #RESTAPI #IdempotentDesign #APIReliability #DoubleChargePrevention #HTTPMethods #PUTvsPOST #StateMutation #APIDesign #TechPodcast #SoftwareEngineering #FexingoBusiness #BusinessPodcast #TheAPIPodcast Keep every episode free: buymeacoffee.com/fexingo
What this episode covers
Lucas and Luna dive deep into API idempotency, the unsung hero preventing double charges and duplicate actions in distributed systems. They break down how Stripe's idempotency keys work, why the concept is tougher than it sounds, and what happens when idempotency fails. Using concrete examples from payment APIs and order systems, they explain the trade-offs between strict and loose idempotency, and why idempotency is becoming a design requirement for any API that mutates state. No prior episode has covered idempotency directly, and it's a concept every developer building modern APIs needs to understand. #APIIdempotency #StripeAPI #IdempotencyKeys #DistributedSystems #PaymentAPIs #RESTAPI #IdempotentDesign #APIReliability #DoubleChargePrevention #HTTPMethods #PUTvsPOST #StateMutation #APIDesign #TechPodcast #SoftwareEngineering #FexingoBusiness #BusinessPodcast #TheAPIPodcast Keep every episode free: buymeacoffee.com/fexingo
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How APIs Handle Idempotency Without Double Charges
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