curl --request POST \
  --url https://api.kalixo.io/v2/orders \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "externalOrderCode": "O-12345",
  "currency": "GBP",
  "orderProducts": [
    {
      "productCode": "10020000213575",
      "quantity": 1,
      "price": 10000,
      "currency": "GBP",
      "sku": "GB-EN-10020000213575"
    }
  ],
  "price": 10000
}
'

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    externalOrderCode: 'O-12345',
    currency: 'GBP',
    orderProducts: [
      {
        productCode: '10020000213575',
        quantity: 1,
        price: 10000,
        currency: 'GBP',
        sku: 'GB-EN-10020000213575'
      }
    ],
    price: 10000
  })
};

fetch('https://api.kalixo.io/v2/orders', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.kalixo.io/v2/orders"

payload = {
    "externalOrderCode": "O-12345",
    "currency": "GBP",
    "orderProducts": [
        {
            "productCode": "10020000213575",
            "quantity": 1,
            "price": 10000,
            "currency": "GBP",
            "sku": "GB-EN-10020000213575"
        }
    ],
    "price": 10000
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.kalixo.io/v2/orders",
  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([
    'externalOrderCode' => 'O-12345',
    'currency' => 'GBP',
    'orderProducts' => [
        [
                'productCode' => '10020000213575',
                'quantity' => 1,
                'price' => 10000,
                'currency' => 'GBP',
                'sku' => 'GB-EN-10020000213575'
        ]
    ],
    'price' => 10000
  ]),
  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;
}