curl -X POST 'https://api.goatpay.com.br/v1/payment-pix/create' \
  -H 'X-API-Key: gp_live_SUA_CHAVE' \
  -H 'Content-Type: application/json' \
  -d '{ "amount": 100, "description": "Pedido 123", "coverFee": false, "emitFiscalInvoice": false }'

{
  "success": true,
  "message": "Pagamento PIX criado com sucesso",
  "data": {
    "id": "clx_transacao",
    "status": "PENDING",
    "amount": 100,
    "copyPaste": "000201010212...",
    "qrCodeImage": "data:image/png;base64,...",
    "expiresAt": "2026-07-08T12:00:00.000Z"
  },
  "requestId": "req_abc"
}