People often try to compare Rentgen with tools like Apidog. On paper it sounds logical — both are related to APIs. But in practice, they solve completely different problems.

Apidog is a full API development platform. You design APIs, mock them, document them, collaborate with your team, write assertions, and integrate everything into CI/CD. It’s a system you live in when building and maintaining APIs.

Rentgen is not that. And it doesn’t try to be.

Rentgen flow: cURL in, tests out

One request in. Reality instead of assumptions.

The moment everyone skips

There is a specific moment in API development that almost nobody talks about. A developer writes an endpoint, sends a request, gets a response, and moves on. Maybe they check for 200 OK, maybe they look at the response body. And then comes the classic line: “I tested it. It works.”

That’s where most problems are already hiding. Not because someone did something wrong, but because only the expected scenario was tested.…