curl 'https://api.goatpay.com.br/v1/coupons/list?page=1&search=VERAO' \
  -H 'X-API-Key: gp_live_SUA_CHAVE'

{
  "success": true,
  "message": "Lista de cupons",
  "data": {
    "items": [{ "id": "clx_coupon", "code": "VERAO10", "discountType": "PERCENT", "discountValue": 10 }],
    "page": 1,
    "pageSize": 50,
    "total": 1,
    "pages": 1
  },
  "requestId": "req_abc"
}