Postman is a monster. It's a pain to use. Classic example of feature overload. Also, they don't have an automatic release channel on Linux. It keeps bugging you to update to latest release and then sends you to page to download a tarball which you have to extract and replace existing install with. Just provide a snap package already.

I was using Insomnia quite happily until it became really resource hungry and CPU started to spike because of it. May be I should give it another try.