const params = new URLSearchParams({
  language: 'en',
  formatCardNumber: 'true',
  postMessageHost: 'https://www.yoursite.com'
});

const response = await fetch(
  `https://service.pcibooking.net/api/payments/paycard/tok_a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4/display?${params}`,
  {
    headers: {
      'Authorization': 'APIKEY your-api-key'
    }
  }
);

const html = await response.text();
console.log(html);

import requests

response = requests.get(
    'https://service.pcibooking.net/api/payments/paycard/tok_a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4/display',
    params={
        'language': 'en',
        'formatCardNumber': 'true',
        'postMessageHost': 'https://www.yoursite.com'
    },
    headers={
        'Authorization': 'APIKEY your-api-key'
    }
)

print(response.text)

HTML content of form