curl --request POST \
  --url https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction \
  --header 'Content-Type: application/xml' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "COMMAND": {
    "TYPE": "<string>",
    "CUSTOMERMSISDN": "<string>",
    "MERCHANTMSISDN": "<string>",
    "AMOUNT": 1,
    "REFERENCE": "<string>",
    "REFERENCE1": "<string>",
    "PIN": "<string>",
    "USERNAME": "<string>",
    "PASSWORD": "<string>"
  }
}
'

import requests

url = "https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction"

payload = { "COMMAND": {
        "TYPE": "<string>",
        "CUSTOMERMSISDN": "<string>",
        "MERCHANTMSISDN": "<string>",
        "AMOUNT": 1,
        "REFERENCE": "<string>",
        "REFERENCE1": "<string>",
        "PIN": "<string>",
        "USERNAME": "<string>",
        "PASSWORD": "<string>"
    } }
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/xml"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/xml'},
  body: JSON.stringify({
    COMMAND: {
      TYPE: '<string>',
      CUSTOMERMSISDN: '<string>',
      MERCHANTMSISDN: '<string>',
      AMOUNT: 1,
      REFERENCE: '<string>',
      REFERENCE1: '<string>',
      PIN: '<string>',
      USERNAME: '<string>',
      PASSWORD: '<string>'
    }
  })
};

fetch('https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction",
  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([
    'COMMAND' => [
        'TYPE' => '<string>',
        'CUSTOMERMSISDN' => '<string>',
        'MERCHANTMSISDN' => '<string>',
        'AMOUNT' => 1,
        'REFERENCE' => '<string>',
        'REFERENCE1' => '<string>',
        'PIN' => '<string>',
        'USERNAME' => '<string>',
        'PASSWORD' => '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/xml",
    "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;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction"

	payload := strings.NewReader("{\n  \"COMMAND\": {\n    \"TYPE\": \"<string>\",\n    \"CUSTOMERMSISDN\": \"<string>\",\n    \"MERCHANTMSISDN\": \"<string>\",\n    \"AMOUNT\": 1,\n    \"REFERENCE\": \"<string>\",\n    \"REFERENCE1\": \"<string>\",\n    \"PIN\": \"<string>\",\n    \"USERNAME\": \"<string>\",\n    \"PASSWORD\": \"<string>\"\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/xml")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/xml")
  .body("{\n  \"COMMAND\": {\n    \"TYPE\": \"<string>\",\n    \"CUSTOMERMSISDN\": \"<string>\",\n    \"MERCHANTMSISDN\": \"<string>\",\n    \"AMOUNT\": 1,\n    \"REFERENCE\": \"<string>\",\n    \"REFERENCE1\": \"<string>\",\n    \"PIN\": \"<string>\",\n    \"USERNAME\": \"<string>\",\n    \"PASSWORD\": \"<string>\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://dev-api-cj-agc-vie.fnstack.dev/v1/charges/airtel/c2b/process-transaction")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/xml'
request.body = "{\n  \"COMMAND\": {\n    \"TYPE\": \"<string>\",\n    \"CUSTOMERMSISDN\": \"<string>\",\n    \"MERCHANTMSISDN\": \"<string>\",\n    \"AMOUNT\": 1,\n    \"REFERENCE\": \"<string>\",\n    \"REFERENCE1\": \"<string>\",\n    \"PIN\": \"<string>\",\n    \"USERNAME\": \"<string>\",\n    \"PASSWORD\": \"<string>\"\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "COMMAND": {
    "STATUS": 123,
    "TXNID": "<string>",
    "MESSAGE": "<string>"
  }
}

"<string>"