Get a price quote for a USD to stablecoin conversion.
mk_live_1234567890abcdef1234567890abcdef).checkout.0.01 and 1000000.USDC, USDT.ethereum, polygon, arbitrum,
optimism, base, bsc, solana, tron.qt_01ARZ3NDEKTSV4RRFFQ69G5FAV).