curl --request POST \
  --url https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create \
  --header 'Content-Type: application/json' \
  --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>' \
  --data '
{
  "merchantProductNo": "MTDC123",
  "productName": "Meituan Bike",
  "priceList": [
    {
      "merchantPriceNo": "MTDC_1123",
      "priceName": "Monthly Plan",
      "priceDesc": "Monthly",
      "priceType": "FIX_AMOUNT",
      "amountType": "fiat",
      "cryptoCurrency": "",
      "cryptoAmount": null,
      "fiatCurrency": "USD",
      "fiatAmount": 10,
      "period": "MONTH",
      "interval": 1,
      "promoConfigType": "NONE",
      "promoAmount": null,
      "promoRate": null
    }
  ]
}
'

import requests

url = "https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create"

payload = {
    "merchantProductNo": "MTDC123",
    "productName": "Meituan Bike",
    "priceList": [
        {
            "merchantPriceNo": "MTDC_1123",
            "priceName": "Monthly Plan",
            "priceDesc": "Monthly",
            "priceType": "FIX_AMOUNT",
            "amountType": "fiat",
            "cryptoCurrency": "",
            "cryptoAmount": None,
            "fiatCurrency": "USD",
            "fiatAmount": 10,
            "period": "MONTH",
            "interval": 1,
            "promoConfigType": "NONE",
            "promoAmount": None,
            "promoRate": None
        }
    ]
}
headers = {
    "X-GatePay-Certificate-ClientId": "<x-gatepay-certificate-clientid>",
    "X-GatePay-Signature": "<x-gatepay-signature>",
    "X-GatePay-Timestamp": "<x-gatepay-timestamp>",
    "X-GatePay-Nonce": "<x-gatepay-nonce>",
    "X-GatePay-On-Behalf-Of": "<x-gatepay-on-behalf-of>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-GatePay-Certificate-ClientId': '<x-gatepay-certificate-clientid>',
    'X-GatePay-Signature': '<x-gatepay-signature>',
    'X-GatePay-Timestamp': '<x-gatepay-timestamp>',
    'X-GatePay-Nonce': '<x-gatepay-nonce>',
    'X-GatePay-On-Behalf-Of': '<x-gatepay-on-behalf-of>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    merchantProductNo: 'MTDC123',
    productName: 'Meituan Bike',
    priceList: [
      {
        merchantPriceNo: 'MTDC_1123',
        priceName: 'Monthly Plan',
        priceDesc: 'Monthly',
        priceType: 'FIX_AMOUNT',
        amountType: 'fiat',
        cryptoCurrency: '',
        cryptoAmount: null,
        fiatCurrency: 'USD',
        fiatAmount: 10,
        period: 'MONTH',
        interval: 1,
        promoConfigType: 'NONE',
        promoAmount: null,
        promoRate: null
      }
    ]
  })
};

fetch('https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'merchantProductNo' => 'MTDC123',
    'productName' => 'Meituan Bike',
    'priceList' => [
        [
                'merchantPriceNo' => 'MTDC_1123',
                'priceName' => 'Monthly Plan',
                'priceDesc' => 'Monthly',
                'priceType' => 'FIX_AMOUNT',
                'amountType' => 'fiat',
                'cryptoCurrency' => '',
                'cryptoAmount' => null,
                'fiatCurrency' => 'USD',
                'fiatAmount' => 10,
                'period' => 'MONTH',
                'interval' => 1,
                'promoConfigType' => 'NONE',
                'promoAmount' => null,
                'promoRate' => null
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-GatePay-Certificate-ClientId: <x-gatepay-certificate-clientid>",
    "X-GatePay-Nonce: <x-gatepay-nonce>",
    "X-GatePay-On-Behalf-Of: <x-gatepay-on-behalf-of>",
    "X-GatePay-Signature: <x-gatepay-signature>",
    "X-GatePay-Timestamp: <x-gatepay-timestamp>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

HttpResponse<String> response = Unirest.post("https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create")
  .header("X-GatePay-Certificate-ClientId", "<x-gatepay-certificate-clientid>")
  .header("X-GatePay-Signature", "<x-gatepay-signature>")
  .header("X-GatePay-Timestamp", "<x-gatepay-timestamp>")
  .header("X-GatePay-Nonce", "<x-gatepay-nonce>")
  .header("X-GatePay-On-Behalf-Of", "<x-gatepay-on-behalf-of>")
  .header("Content-Type", "application/json")
  .body("{\n  \"merchantProductNo\": \"MTDC123\",\n  \"productName\": \"Meituan Bike\",\n  \"priceList\": [\n    {\n      \"merchantPriceNo\": \"MTDC_1123\",\n      \"priceName\": \"Monthly Plan\",\n      \"priceDesc\": \"Monthly\",\n      \"priceType\": \"FIX_AMOUNT\",\n      \"amountType\": \"fiat\",\n      \"cryptoCurrency\": \"\",\n      \"cryptoAmount\": null,\n      \"fiatCurrency\": \"USD\",\n      \"fiatAmount\": 10,\n      \"period\": \"MONTH\",\n      \"interval\": 1,\n      \"promoConfigType\": \"NONE\",\n      \"promoAmount\": null,\n      \"promoRate\": null\n    }\n  ]\n}")
  .asString();

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create"

	payload := strings.NewReader("{\n  \"merchantProductNo\": \"MTDC123\",\n  \"productName\": \"Meituan Bike\",\n  \"priceList\": [\n    {\n      \"merchantPriceNo\": \"MTDC_1123\",\n      \"priceName\": \"Monthly Plan\",\n      \"priceDesc\": \"Monthly\",\n      \"priceType\": \"FIX_AMOUNT\",\n      \"amountType\": \"fiat\",\n      \"cryptoCurrency\": \"\",\n      \"cryptoAmount\": null,\n      \"fiatCurrency\": \"USD\",\n      \"fiatAmount\": 10,\n      \"period\": \"MONTH\",\n      \"interval\": 1,\n      \"promoConfigType\": \"NONE\",\n      \"promoAmount\": null,\n      \"promoRate\": null\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-GatePay-Certificate-ClientId", "<x-gatepay-certificate-clientid>")
	req.Header.Add("X-GatePay-Signature", "<x-gatepay-signature>")
	req.Header.Add("X-GatePay-Timestamp", "<x-gatepay-timestamp>")
	req.Header.Add("X-GatePay-Nonce", "<x-gatepay-nonce>")
	req.Header.Add("X-GatePay-On-Behalf-Of", "<x-gatepay-on-behalf-of>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://openplatform.gateapi.io/merchant/open/institution/v1/pay/merchant/product/create")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-GatePay-Certificate-ClientId"] = '<x-gatepay-certificate-clientid>'
request["X-GatePay-Signature"] = '<x-gatepay-signature>'
request["X-GatePay-Timestamp"] = '<x-gatepay-timestamp>'
request["X-GatePay-Nonce"] = '<x-gatepay-nonce>'
request["X-GatePay-On-Behalf-Of"] = '<x-gatepay-on-behalf-of>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"merchantProductNo\": \"MTDC123\",\n  \"productName\": \"Meituan Bike\",\n  \"priceList\": [\n    {\n      \"merchantPriceNo\": \"MTDC_1123\",\n      \"priceName\": \"Monthly Plan\",\n      \"priceDesc\": \"Monthly\",\n      \"priceType\": \"FIX_AMOUNT\",\n      \"amountType\": \"fiat\",\n      \"cryptoCurrency\": \"\",\n      \"cryptoAmount\": null,\n      \"fiatCurrency\": \"USD\",\n      \"fiatAmount\": 10,\n      \"period\": \"MONTH\",\n      \"interval\": 1,\n      \"promoConfigType\": \"NONE\",\n      \"promoAmount\": null,\n      \"promoRate\": null\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "success": "true",
  "code": "0",
  "message": "",
  "data": {
    "merchantProductNo": "MTDC123",
    "productNo": "82973642140155927",
    "productName": "Meituan Bike",
    "productDesc": "Meituan Bike Membership",
    "productLogo": "https://s3.ap-northeast-1.amazonaws.com/gimg.gateimg.com/image/1627288/fe48d444c1943d65fb0125d766a7124d277f52d7112eebe6df47e321bafda073.jpg",
    "status": "ACTIVE",
    "createTime": 1774853409437,
    "updateTime": 1774853409437,
    "priceList": [
      {
        "merchantPriceNo": "MTDC_1123",
        "priceNo": "82973642140155928",
        "productNo": "82973642140155927",
        "priceName": "Monthly Plan",
        "priceDesc": "Monthly",
        "priceType": "FIX_AMOUNT",
        "payChannels": [
          {
            "channel": "GATEPAY",
            "status": "ACTIVE"
          }
        ],
        "amountType": "fiat",
        "cryptoCurrency": "",
        "cryptoAmount": null,
        "fiatCurrency": "USD",
        "fiatAmount": 10,
        "period": "MONTH",
        "interval": 1,
        "promoConfigType": "NONE",
        "promoAmount": null,
        "promoRate": null,
        "status": "ACTIVE",
        "createTime": 1774853409437,
        "updateTime": 1774853409437
      }
    ]
  }
}