How to programmatically get free agents for a league?

[nivshah]

List of players and their Ottoneu positions (Player Universe)

I know there’s a list of players and their Ottoneu positions out there somewhere, I just can’t find it. If anyone could point me in the right direction I would greatly appreciate it. I am trying to create some tools in R now that I have some time on my hands.

You can just download the player universe, which is pretty regularly updated, and if a player is not on an active roster in your league, they are a free agent.