Today I learned about .http files that you can use to make/test requests to any api endpoint from within most IDEs/editors.
This started with the Rest client vscode extension and then Visual Studio 2022 added support somewhat recently.
It kinda acts like an alternative to something like Postman but without leaving your editor, but for me the nice thing is it can act like a runnable form of documentation for your api that you can commit alongside your code.