curl --request POST \
  --url https://api.kyrenpay.com/epay/submit.php \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data pid=merch_001 \
  --data type=alipay \
  --data out_trade_no=order_20260409001 \
  --data notify_url=https://merchant.example.com/pay/notify \
  --data return_url=https://merchant.example.com/pay/return \
  --data 'name=AI Credits Package' \
  --data money=99.00 \
  --data money_type=CNY \
  --data 'display_merchant_name=Campaign Store' \
  --data param=user_42 \
  --data sign=fb7f5f742f89eb1f137fbc293f2bf42a \
  --data sign_type=MD5

import requests

url = "https://api.kyrenpay.com/epay/submit.php"

payload = {
    "pid": "merch_001",
    "type": "alipay",
    "out_trade_no": "order_20260409001",
    "notify_url": "https://merchant.example.com/pay/notify",
    "return_url": "https://merchant.example.com/pay/return",
    "name": "AI Credits Package",
    "money": "99.00",
    "money_type": "CNY",
    "display_merchant_name": "Campaign Store",
    "param": "user_42",
    "sign": "fb7f5f742f89eb1f137fbc293f2bf42a",
    "sign_type": "MD5"
}
headers = {"Content-Type": "application/x-www-form-urlencoded"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/x-www-form-urlencoded'},
  body: new URLSearchParams({
    pid: 'merch_001',
    type: 'alipay',
    out_trade_no: 'order_20260409001',
    notify_url: 'https://merchant.example.com/pay/notify',
    return_url: 'https://merchant.example.com/pay/return',
    name: 'AI Credits Package',
    money: '99.00',
    money_type: 'CNY',
    display_merchant_name: 'Campaign Store',
    param: 'user_42',
    sign: 'fb7f5f742f89eb1f137fbc293f2bf42a',
    sign_type: 'MD5'
  })
};

fetch('https://api.kyrenpay.com/epay/submit.php', 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://api.kyrenpay.com/epay/submit.php",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "pid=merch_001&type=alipay&out_trade_no=order_20260409001&notify_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Fnotify&return_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Freturn&name=AI%20Credits%20Package&money=99.00&money_type=CNY&display_merchant_name=Campaign%20Store&param=user_42&sign=fb7f5f742f89eb1f137fbc293f2bf42a&sign_type=MD5",
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/x-www-form-urlencoded"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.kyrenpay.com/epay/submit.php"

	payload := strings.NewReader("pid=merch_001&type=alipay&out_trade_no=order_20260409001&notify_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Fnotify&return_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Freturn&name=AI%20Credits%20Package&money=99.00&money_type=CNY&display_merchant_name=Campaign%20Store&param=user_42&sign=fb7f5f742f89eb1f137fbc293f2bf42a&sign_type=MD5")

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

	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.kyrenpay.com/epay/submit.php")
  .header("Content-Type", "application/x-www-form-urlencoded")
  .body("pid=merch_001&type=alipay&out_trade_no=order_20260409001&notify_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Fnotify&return_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Freturn&name=AI%20Credits%20Package&money=99.00&money_type=CNY&display_merchant_name=Campaign%20Store&param=user_42&sign=fb7f5f742f89eb1f137fbc293f2bf42a&sign_type=MD5")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.kyrenpay.com/epay/submit.php")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/x-www-form-urlencoded'
request.body = "pid=merch_001&type=alipay&out_trade_no=order_20260409001&notify_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Fnotify&return_url=https%3A%2F%2Fmerchant.example.com%2Fpay%2Freturn&name=AI%20Credits%20Package&money=99.00&money_type=CNY&display_merchant_name=Campaign%20Store&param=user_42&sign=fb7f5f742f89eb1f137fbc293f2bf42a&sign_type=MD5"

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

{
  "code": 0,
  "msg": "签名验证失败"
}

{
  "code": 42901,
  "message": "Too many requests"
}