Hey! this looks cool. I'm curious how it works, can you share more? you said it's not a subscription and it's "pay for what you use". So hows the pricing work?

Hey! this looks cool. I'm curious how it works, can you share more? you said it's not a subscription and it's "pay for what you use". So hows the pricing work? Do you charge me or I'll bring an API key to some other TTS provider?