curl -X GET 'https://api.goatpay.com.br/v1/pix-automatic/payment-instructions/get/d1c9c4b2-6a97-4573-9d6d-26bb64f04c28' \
  -H 'X-API-Key: gp_live_SUA_CHAVE'

{
  "success": true,
  "message": "Instrução de pagamento encontrada",
  "data": {
    "id": "d1c9c4b2-6a97-4573-9d6d-26bb64f04c28",
    "status": "SCHEDULED",
    "value": 99.9,
    "scheduleDate": "2026-07-01",
    "authorizationId": "a33047b1-fb19-4b68-9373-a7ba8a8162aa",
    "paymentId": "clx_billing",
    "dateCreated": "2026-06-15T10:00:00.000Z"
  },
  "requestId": "req_abc"
}