curl -X POST "https://dev.api.onekhusa.com/sandbox/v1/merchants/accounts/topup" \
  --header "Authorization: Bearer your-jwt-token" \
  --header "Content-Type: application/json" \
  --header "Accept-Language: en" \
  -d '{
    "merchantAccountNumber": 35253486,
    "connectorId": 550044,
    "topupAmount": 1000000.00,
    "createdBy": "johndoe@example.com"
  }'

import requests

url = "https://dev.api.onekhusa.com/sandbox/v1/merchants/accounts/topup"

payload = {
    "merchantAccountNumber": 35253486,
    "connectorId": 550044,
    "topupAmount": 1000000,
    "createdBy": "johndoe@example.com"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    merchantAccountNumber: 35253486,
    connectorId: 550044,
    topupAmount: 1000000,
    createdBy: 'johndoe@example.com'
  })
};

fetch('https://dev.api.onekhusa.com/sandbox/v1/merchants/accounts/topup', 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.onekhusa.com/sandbox/v1/merchants/accounts/topup",
  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([
    'merchantAccountNumber' => 35253486,
    'connectorId' => 550044,
    'topupAmount' => 1000000,
    'createdBy' => 'johndoe@example.com'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.onekhusa.com/sandbox/v1/merchants/accounts/topup"

	payload := strings.NewReader("{\n  \"merchantAccountNumber\": 35253486,\n  \"connectorId\": 550044,\n  \"topupAmount\": 1000000,\n  \"createdBy\": \"johndoe@example.com\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	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.onekhusa.com/sandbox/v1/merchants/accounts/topup")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"merchantAccountNumber\": 35253486,\n  \"connectorId\": 550044,\n  \"topupAmount\": 1000000,\n  \"createdBy\": \"johndoe@example.com\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://dev.api.onekhusa.com/sandbox/v1/merchants/accounts/topup")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"merchantAccountNumber\": 35253486,\n  \"connectorId\": 550044,\n  \"topupAmount\": 1000000,\n  \"createdBy\": \"johndoe@example.com\"\n}"

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

{
  "beneficiary": {
    "accountNumber": 12346198,
    "accountName": "MERCHANT SANDBOX",
    "amountReceived": 49500,
    "currencyCode": "MWK"
  },
  "source": {
    "accountNumber": "5271306",
    "customerName": "ANGEL BAULENI",
    "amountSent": 50000,
    "currencyCode": "MWK",
    "sourceReferenceNumber": "JF260209114N",
    "connectorId": 212188,
    "connectorName": "National Bank of Malawi"
  },
  "transaction": {
    "transactionReferenceNumber": "CBPC73IQ5U2E",
    "transactionFee": 500,
    "transactionDescription": "Fake Merchant Account Topup",
    "transactionDate": "2026-02-09T15:12:52.8020476+02:00",
    "valueDate": "2026-02-09T15:12:52.8020476+02:00",
    "transactionCode": "BAM",
    "transactionTypeName": "Account To Merchant",
    "transactionStatusCode": "S",
    "transactionStatusName": "Success",
    "bridgeReferenceNumber": "019c4288-9342-7ebd-a947-6d97d4da77ed",
    "responseCode": "S100",
    "responseMessage": "Successful transaction"
  }
}