1kb.link - Its a 5 in 1 tool.
Shorten.REST - A URL shortener API you can depend on
Zaap - Gumroad + Linktree alternative for creators
PixelMe - URL shortener for savvy marketers
Cutt.ly - Free custom URL Shortener and branded URLs with advanced links tracking and Link Management Platform & API.
Pixela - Record and Track your habits or effort. All by API.