smallifier
Smallifier is a small link shortener.
It responds to HTTP requests like so:
$ curl -d '{"long_url": "https://please.smallifiy.me"}' -v https://smallifier/_create
{"short_url":"https://smallifier/tj2TEXT7"}
And after this, navigating to https://smallifier/tj2TEXT7
will 302 you to https://please.smallify.me