{"mensaje":"Este endpoint requiere POST con JSON, ej: {\"original\":\"Price: 10 EUR\\nDelivery: 3 days\\nWarranty: 1 year\",\"modified\":\"Price: 12 EUR\\nDelivery: 3 days\\nWarranty: 2 years\"}. Precio: $0.003 USDC (Solana o Base)."}