HTTPie.io
This is more a Today I Discoverved (Tid?) than Today I learned, but I discovered httpie which is an app to make manual http requests and is very neat. I only used the basic functionality but is very well polished and definitely a tool to have in my toolbox in the future.
You can choose between the web version and desktop app (ofc using electron) and a terminal app.
Bonus: I learned how HTTP basic auth is sent in a request, you need to add an header with Authorization: Basic <credentials> where credentials are your credentials encoded in base64, however I didn’t easily find how you should format your credentials before encoding them