curl --request POST \
  --url https://api.staging.kairosafrika.cloud/paygw/v1/payment \
  --header 'Authorization: Basic $(echo -n "username:password" | base64)' \
  --header 'Content-Type: application/json' \
  --data '{
    "amount": 1,
    "referenceNo": "889909909229",
    "payee": "Kairos",
    "narration": "PIZZAMAN/CHICKMAN",
    "msisdn": "233559400612",
    "callbackId": "6607c05155dfd4919c18c44",
    "payer": "testOne"
  }'

const username = 'your_username';
const password = 'your_password';
const credentials = btoa(`${username}:${password}`);

const response = await fetch('https://api.staging.kairosafrika.cloud/paygw/v1/payment', {
  method: 'POST',
  headers: {
    'Authorization': `Basic ${credentials}`,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    amount: 1,
    referenceNo: '889909909229',
    payee: 'Kairos',
    narration: 'PIZZAMAN/CHICKMAN',
    msisdn: '233559400612',
    callbackId: '6607c05155dfd4919c18c44',
    payer: 'testOne'
  })
});

const result = await response.json();
console.log(result);

import requests
import base64

username = 'your_username'
password = 'your_password'
credentials = base64.b64encode(f'{username}:{password}'.encode()).decode()

response = requests.post(
    'https://api.staging.kairosafrika.cloud/paygw/v1/payment',
    headers={
        'Authorization': f'Basic {credentials}',
        'Content-Type': 'application/json'
    },
    json={
        'amount': 1,
        'referenceNo': '889909909229',
        'payee': 'Kairos',
        'narration': 'PIZZAMAN/CHICKMAN',
        'msisdn': '233559400612',
        'callbackId': '6607c05155dfd4919c18c44',
        'payer': 'testOne'
    }
)

result = response.json()
print(result)

<?php
$username = 'your_username';
$password = 'your_password';
$credentials = base64_encode($username . ':' . $password);

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.staging.kairosafrika.cloud/paygw/v1/payment',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS => json_encode(array(
    'amount' => 1,
    'referenceNo' => '889909909229',
    'payee' => 'Kairos',
    'narration' => 'PIZZAMAN/CHICKMAN',
    'msisdn' => '233559400612',
    'callbackId' => '6607c05155dfd4919c18c44',
    'payer' => 'testOne'
  )),
  CURLOPT_HTTPHEADER => array(
    'Authorization: Basic ' . $credentials,
    'Content-Type: application/json'
  ),
));

$response = curl_exec($curl);
curl_close($curl);
echo $response;
?>