I wrote this (https://github.com/posborne/putio-sync) a few weekends ago for automatically grabbing content from put.io using their API (https://put.io/v2/docs/index.html). Pretty handy and performs downloads quickly by doing multi-segment downloads. Pure python and MIT licensed -- should be pip installable from pypi.

I string this together with another script to rename content and it drops right into my Plex library.