Is there an API endpoint that does just this? Say you provide it with a full/normal link (google.com) and it returns the shortened version (hubs.ly/abc123). Or should I be looking into bitly API? Below is what I am referring to.
Link shortening in social posts
Hi, @AntreasPapadopo 
Welcome to our community!
You are not missing an option. While we can access this in-app from the Social Media tool, there is not a HubSpot public endpoint to do this programmatically.
Have fun building! Jaycee