Or git-native means.
It seems to be some kind of wysiwyg editor? With elements specific to API docs?
But then why does that make it an "API client". I'm guessing "API" specifically means HTTP API here. But "client" is completely throwing me. An API client is just software that talks to an API. So what's with the wysiwyg stuff?
Is it something like Jupyter notebooks?
By definition, API Client is a devtool that makes it easier for devs (& co.) to design, test, document, and debug APIs. If it's confusing, we can take it to Postman, but it's an industry standard, been that way for a long while.
That's not the definition of "API client" I'm familiar with. In fact it feels like a very specific definition of "API client" - which is a broad term that I am familiar with.
(Why does it sometimes feel like I am not getting the memos that everyone else is getting? It's like when a new job description for an old job suddenly appears and everyone pretends that what it's always been called!)