curl --request GET \
  --url https://openplatform.gateapi.io/payment/open/institution/v1/pay/convert/pair \
  --header 'X-GatePay-Certificate-ClientId: <x-gatepay-certificate-clientid>' \
  --header 'X-GatePay-Nonce: <x-gatepay-nonce>' \
  --header 'X-GatePay-On-Behalf-Of: <x-gatepay-on-behalf-of>' \
  --header 'X-GatePay-Signature: <x-gatepay-signature>' \
  --header 'X-GatePay-Timestamp: <x-gatepay-timestamp>'

{
  "status": "SUCCESS",
  "code": "000000",
  "errorMessage": "",
  "data": [
    {
      "pair": "BTC_USDT",
      "sellCurrency": "BTC",
      "sellCurrencyMax": "31",
      "sellCurrencyMin": "0.0002",
      "buyCurrency": "USDT",
      "buyCurrencyMax": "1980000",
      "buyCurrencyMin": "12"
    },
    {
      "pair": "BNB_USDT",
      "sellCurrency": "BNB",
      "sellCurrencyMax": "410",
      "sellCurrencyMin": "0.1",
      "buyCurrency": "USDT",
      "buyCurrencyMax": "100000",
      "buyCurrencyMin": "10"
    }
  ]
}