const response = await fetch('https://service.pcibooking.net/api/eWalletOperation/validateResults', {
  method: 'POST',
  headers: {
    'Authorization': 'APIKEY your-api-key',
    'Content-Type': 'text/plain'
  },
  body: resultTokenFromClient
});
const data = await response.json();
console.log(data.valid); // true if token is authentic

import requests

response = requests.post(
    'https://service.pcibooking.net/api/eWalletOperation/validateResults',
    headers={
        'Authorization': 'APIKEY your-api-key',
        'Content-Type': 'text/plain'
    },
    data=result_token_from_client
)
data = response.json()
print(data['valid'])  # True if token is authentic

{
    "valid": true
}

{
    "code": -125,
    "message": "Bad input data",
    "moreInfo": "...",
    "errorList": null
}