I find the Collections feature in Postman to be really helpful. Is there a similar feature in Httpie? I couldn't see anything on the github README.
It's the nice thing with GUIs (Paw, Postman...)! Paw saves all your work in ".paw" documents that you can share with your team on Dropbox or Git. You can have many documents, and organize your API calls.
Disclaimer: I'm the founder of Paw.
Can it compare a response to a previously saved response? That would be handy for looking for regressions when refactoring the code behind an API.