The http snap packages httpie, with unix socket support so it can talk to snapd as well.
To get the new version please install from the candidate channel (snap install --candidate http).
I’ve tested it on Ubuntu 16.04 and it works. I’d appreciate testing on Arch, Fedora, and Ubuntu 18.04. As it’s python, if you have a not-mainly-ASCII locale I’d appreciate that as well.
What to test:
GET json HTTP api: http http://ip.jsontest.com/. Output should be pretty-printed and colorized.