Bulk SMS API in Bangladesh

import requests

url = "https://api.sms.net.bd/sendsms"

payload = {'api_key': 'YOUR_API_KEY',
    'msg': 'Test',
    'to': '8801800000000'
    }

response = requests.request("POST", url, data=payload)

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.sms.net.bd/sendsms',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS => array('api_key' => 'YOUR_API_KEY','msg' => 'Test','to' => '8801800000000'),
));

$response = curl_exec($curl);

curl_close($curl);

Unirest.setTimeouts(0, 0);
HttpResponse<String> response = Unirest.post("https://api.sms.net.bd/sendsms")
  .multiPartContent()
  .field("api_key", "YOUR_API_KEY")
  .field("msg", "Test")
  .field("to", "8801800000000")
  .asString();

var request = require('request');
var options = {
  'method': 'POST',
  'url': 'https://api.sms.net.bd/sendsms',
  formData: {
    'api_key': 'YOUR_API_KEY',
    'msg': 'Test',
    'to': '8801800000000'
  }
};
request(options, function (error, response) {
  if (error) throw new Error(error);
  console.log(response.body);
});

//Adding Library
using System.Net.Http;
using System.Net.Http.Headers;
using Newtonsoft.Json; //Adding New Package Newtonsoft


public class Program
{
    public static void Main(string[] args)
    {
        using (var client = new HttpClient())
        {
            string API_Url = "https://api.sms.net.bd/sendsms";
            string API_Key = "YOUR_API_KEY";
            string Text_Massage = "YOUR_MSG";
            string To_Phone_Number = "NUMBER_TO_SEND";

            client.BaseAddress = new Uri(API_Url);// //
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            var response = client.GetAsync("?api_key=" + API_Key + "&msg=" + Text_Massage + "&to=" + To_Phone_Number).Result;
            using (HttpContent content = response.Content)
            {
                var bkresult = content.ReadAsStringAsync().Result;
                dynamic stuff = JsonConvert.DeserializeObject(bkresult);
                if (stuff.error == "0")
                {
                    Console.WriteLine(stuff.msg);
                }
                else
                {
                    Console.WriteLine("Sms Not Send, " + stuff.msg);
                }

            }
        }
    }
}