I'd recommend pb <https://github.com/ptpb/pb>. It is free and open-source (so you can easily host your own deployment of it—it's even in the AUR for Arch users: <https://aur.archlinux.org/packages/pb-git/>), provides a ton of features that no other pastebin offers and provides most (if not all) of the features provided by other common cli-accessible pastebins (like ix and sprunge). You can find the reference deployment at <https://ptpb.pw>.
Actually, the link is just fine; it appears that you have discovered a bug in HN's URL matching algorithm. < and > are explicitly recommended by the URI RFC [1] as delimiters for URLs.
This is such a cool project as a whole. The domain, the simplicity of the project (curl wrapper), the fact that the homepage is basically a man page, the simple auth. It's just an awesome concept and really well done.
You don't. Ix is not Open-source. Sprunge (an alternative) is, but I never found it to be very simple. This is one of the things I so love about pb (see my other comment ITT).
Give a shout-out to the Author(s). They are quite responsive. One of them is on the verge of rewriting pb overall to leverage some nicer things that have been created since pb's creation along with making it even faster (despite the fact that, ime, it is already faster than most other pastebins (in the US)).
So I still need it in order to build it. People tend to forget that other people might want to build their software to package it for a distro, and would even like to run the test suite, and they use crazy amounts of build time dependencies that make it hard to do.