To collect fees, we need to register you. For that, we need the integrator string that you want to go with. That can for example be the name of your dApp. It should not contain whitespaces, the rest is up to you.
Furthermore we need the wallet address that should be used to collect the fees. Once we have that we can configure it for you.
LI.FI collects a Monthly Service Fee which is 25bps (0.25%) for each transaction that is executed via LI.FI Smart Contracts & Services.
Please reach out to sales@li.finance to get set up to collect fees.