{"mensaje":"Este endpoint requiere POST con JSON, ej: {\"texto\":\"Artificial intelligence agents are transforming the digital economy. AI agents pay for data with micropayments. The x402 protocol lets agents pay per call without accounts. Many companies already offer pay-per-use APIs for agents. USDC micropayments make this business model viable.\",\"limite\":5}. Precio: $0.003 USDC (Solana o Base)."}