There’s a funny moment in API development that almost nobody talks about. A developer finishes an endpoint, sends one request, gets a beautiful 200 OK back, and suddenly the room behaves like the API survived Normandy. Then somebody opens ReadyAPI, starts building proper test suites, adds assertions, environments, CI integration, performance checks, maybe even security testing. Serious enterprise stuff. And to be fair, ReadyAPI absolutely deserves its reputation. SoapUI evolved into one of the biggest API testing platforms for a reason. Banks, telecoms, healthcare systems — this is the territory where structured testing matters and auditors enjoy PowerPoint presentations about “quality gates”. But there’s a problem hiding before all of that. What if the endpoint was already fragile before the first test suite even existed? That’s the gap Rentgen focuses on. Not enterprise automation. Not giant regression packs. Just the uncomfortable two-minute reality check right after “it works”.…