TestGuild Automation Podcast · 2026-06-30 · 23 min
Most API testing stops at the happy path. The problem is that the bugs that actually hurt you in production are sitting in everything many testers skip, like the boundary values, the oversized payloads, the missing tokens, the security headers, the inputs that make no sense at all. In this episode, Joe sits down with Liudas Jankauskas, who has spent almost twenty years breaking software and testing APIs since 2008. Liudas demonstrates Rentgen , his free and open-source API testing tool, live on screen. You'll watch him take a single request from a real app, map it in seconds, and generate dozens of tests covering security, boundaries, performance, and load - all from one click. You'll learn: How to discover APIs hiding under the hood of any application, even when there is zero documentation Why happy path testing leaves you exposed How to run a fast hygiene check before your real automation ever starts Liudas also explains why Rentgen runs completely locally with no server and no data leaving your machine, making it safe for banking, healthcare, and other regulated environments.
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