Crypto off-ramp quote: sell USDC (or another stablecoin) and cash out to a bank account. Given a target currency (ISO 4217) and a USD source amount, returns the FX rate, fees, and how much fiat the recipient receives. First step to convert crypto to fiat and pay out to a bank in 80+ currencies. Returns quote.targetAmount and a quoteId to lock the rate for a transfer. Pay 0.01 USDC.