The program does not use any API, it uses the reddit website to create accounts. It uses 2captcha to solve captchas.
You can create a file named torrc
on Windows at %APPDATA%\tor\ and add the following lines:
CircuitBuildTimeout 30
LearnCircuitBuildTimeout 0
MaxCircuitDirtiness 30
It won't assure that a new IP will be assigned at every 30 seconds, but it will assure that the circuit is rebuilt every 30 seconds