The Developer Tools Podcast with Fexingo · 2026-08-03 · 10 min
In this episode, Lucas and Luna dive into the art of API versioning without breaking your users. They explore why semantic versioning isn't enough for APIs, the pitfalls of date-based versioning (even if Stripe does it), and the rise of additive changes with compatibility layers. Through the lens of a real-world example - a major payment platform's shift from v1 to v2 - they break down the four rules of backward compatibility: never remove fields, always add optional ones, keep old endpoints alive, and communicate deprecations with grace periods. They also discuss how to use feature flags to toggle behavior without a new version, and why your API's versioning strategy is a contract with your developers. If you've ever dreaded the v2 launch, this episode gives you a practical playbook to migrate users smoothly and keep your API ecosystem thriving.
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