curl --request POST \
  --url https://api.kyrenpay.com/v1/checkouts \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "productId": "prod_abc123",
  "successUrl": "https://example.com/success",
  "cancelUrl": "https://example.com/cancel",
  "customerEmail": "customer@example.com",
  "displayMerchantName": "Campaign Store",
  "metadata": {
    "userId": "user_456"
  }
}
'

import requests

url = "https://api.kyrenpay.com/v1/checkouts"

payload = {
    "productId": "prod_abc123",
    "successUrl": "https://example.com/success",
    "cancelUrl": "https://example.com/cancel",
    "customerEmail": "customer@example.com",
    "displayMerchantName": "Campaign Store",
    "metadata": { "userId": "user_456" }
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    productId: 'prod_abc123',
    successUrl: 'https://example.com/success',
    cancelUrl: 'https://example.com/cancel',
    customerEmail: 'customer@example.com',
    displayMerchantName: 'Campaign Store',
    metadata: {userId: 'user_456'}
  })
};

fetch('https://api.kyrenpay.com/v1/checkouts', 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/v1/checkouts",
  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([
    'productId' => 'prod_abc123',
    'successUrl' => 'https://example.com/success',
    'cancelUrl' => 'https://example.com/cancel',
    'customerEmail' => 'customer@example.com',
    'displayMerchantName' => 'Campaign Store',
    'metadata' => [
        'userId' => 'user_456'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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/v1/checkouts"

	payload := strings.NewReader("{\n  \"productId\": \"prod_abc123\",\n  \"successUrl\": \"https://example.com/success\",\n  \"cancelUrl\": \"https://example.com/cancel\",\n  \"customerEmail\": \"customer@example.com\",\n  \"displayMerchantName\": \"Campaign Store\",\n  \"metadata\": {\n    \"userId\": \"user_456\"\n  }\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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))

}

HttpResponse<String> response = Unirest.post("https://api.kyrenpay.com/v1/checkouts")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"productId\": \"prod_abc123\",\n  \"successUrl\": \"https://example.com/success\",\n  \"cancelUrl\": \"https://example.com/cancel\",\n  \"customerEmail\": \"customer@example.com\",\n  \"displayMerchantName\": \"Campaign Store\",\n  \"metadata\": {\n    \"userId\": \"user_456\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.kyrenpay.com/v1/checkouts")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"productId\": \"prod_abc123\",\n  \"successUrl\": \"https://example.com/success\",\n  \"cancelUrl\": \"https://example.com/cancel\",\n  \"customerEmail\": \"customer@example.com\",\n  \"displayMerchantName\": \"Campaign Store\",\n  \"metadata\": {\n    \"userId\": \"user_456\"\n  }\n}"

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

{
  "code": 0,
  "message": "success",
  "data": {
    "id": "cs_xyz789",
    "productId": "prod_abc123",
    "amount": "9.99",
    "currency": "USD",
    "status": "OPEN",
    "url": "https://payment.kyren.io/checkout/cs_xyz789",
    "expiresAt": 1736934000000,
    "createdAt": 1736932200000
  }
}

{
  "code": 400,
  "message": "Bad Request",
  "error": {
    "field": "productId",
    "reason": "Product ID is required"
  }
}

{
  "code": 401,
  "message": "Unauthorized"
}