How API Stubs Beat Real Backends for Testing

What this episode covers

Lucas and Luna explore the practice of API stubbing — how developers replace real backends with lightweight mock services during testing. They break down a specific case: a fintech startup that cut its integration-test suite from 45 minutes to under 3 by stubbing payment and ledger APIs. The episode contrasts stubs with mocks and fakes, explains when stubbing hides real bugs (the 'false green' problem), and walks through a pragmatic decision tree for choosing a test-double strategy. Listeners learn why companies like Stripe and Twilio publish official stub libraries and how the practice fits into a shift-left testing philosophy. #APIStubbing #MockServices #SoftwareTesting #TestDoubles #IntegrationTesting #Stripe #Twilio #ShiftLeft #DeveloperTools #TechPodcast #FexingoBusiness #BusinessPodcast #APITesting #Fintech #Mocking #TestAutomation #BackendDevelopment #SoftwareEngineering Keep every episode free: buymeacoffee.com/fexingo

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Frequently Asked Questions

How long is this episode of The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs?

This episode is 10 minutes long.

When was this The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs episode published?

This episode was published on June 12, 2026.

What is this episode about?

Lucas and Luna explore the practice of API stubbing — how developers replace real backends with lightweight mock services during testing. They break down a specific case: a fintech startup that cut its integration-test suite from 45 minutes to under...

Can I download this The API Podcast with Fexingo: REST, GraphQL, and Modern Web APIs episode?

Yes, you can download this episode by clicking the download button on the episode player, or subscribe to the podcast in your preferred podcast app for automatic downloads.