Simplified setup

curl --request POST \
 --url https://gatewaysandbox.paybyrd.com/api/v2/payment \
 --header 'content-type: application/json' \
 --header 'x-api-key: {your_api_key}' \
 --data '{
 "type": "card",
 "isoAmount": 100,
 "currency": "EUR",
 "orderRef": "YOUR_REF_CODE_HERE",
 "redirectUrl": "https://your-shop-url?orderRef=YOUR_REF_CODE_HERE",
 "card": {
   "number": "5555341244441115",
   "expiration": "12/30",
   "cvv": "893",
   "holder": "Paybyrd"
 }
}'

const axios = require('axios');

const response = await axios.post('https://gatewaysandbox.paybyrd.com/api/v2/payment', {
  type: 'card',
  isoAmount: 100,
  currency: 'EUR',
  orderRef: 'YOUR_REF_CODE_HERE',
  redirectUrl: 'https://your-shop-url?orderRef=YOUR_REF_CODE_HERE',
  card: {
    number: '5555341244441115',
    expiration: '12/30',
    cvv: '893',
    holder: 'Paybyrd'
  }
}, {
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': '{your_api_key}'
  }
});
console.log(response.data);

using var client = new HttpClient();

client.DefaultRequestHeaders.Add("x-api-key", "{your_api_key}");

var requestBody = new
{
  type = "card",
  isoAmount = 100,
  currency = "EUR",
  orderRef = "YOUR_REF_CODE_HERE",
  redirectUrl = "https://your-shop-url?orderRef=YOUR_REF_CODE_HERE",
  card = new
  {
    number = "5555341244441115",
    expiration = "12/30",
    cvv = "893",
    holder = "Paybyrd"
  }
};

var response = await client.PostAsync(
  "https://gatewaysandbox.paybyrd.com/api/v2/payment",
  new StringContent(System.Text.Json.JsonSerializer.Serialize(requestBody), Encoding.UTF8, "application/json"));

string responseContent = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseContent);

$apiKey = "{your_api_key}";
$url = "https://gatewaysandbox.paybyrd.com/api/v2/payment";

$data = [
    "type" => "card",
    "isoAmount" => 100,
    "currency" => "EUR",
    "orderRef" => "YOUR_REF_CODE_HERE",
    "redirectUrl" => "https://your-shop-url?orderRef=YOUR_REF_CODE_HERE",
    "card" => [
        "number" => "5555341244441115",
        "expiration" => "12/30",
        "cvv" => "893",
        "holder" => "Paybyrd"
    ]
];

$options = [
    "http" => [
        "header" => "Content-Type: application/json\r\n" .
                     "x-api-key: $apiKey\r\n",
        "method" => "POST",
        "content" => json_encode($data),
    ],
];

$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);

if ($result === FALSE) {
    die('Error occurred');
}

echo $result;

import requests
import json

url = "https://gatewaysandbox.paybyrd.com/api/v2/payment"
headers = {
    "Content-Type": "application/json",
    "x-api-key": "{your_api_key}"
}

data = {
    "type": "card",
    "isoAmount": 100,
    "currency": "EUR",
    "orderRef": "YOUR_REF_CODE_HERE",
    "redirectUrl": "https://your-shop-url?orderRef=YOUR_REF_CODE_HERE",
    "card": {
        "number": "5555341244441115",
        "expiration": "12/30",
        "cvv": "893",
        "holder": "Paybyrd"
    }
}

response = requests.post(url, headers=headers, data=json.dumps(data))
print(response.json())