Needs the curl extension (normal on most hosting). Download mysender-client.php below and put it next to your script.

Copy<?php
require 'mysender-client.php';          // download it from this page

$ms = new MySenderClient('YOUR_AUTH_KEY', 'YOUR_APP_KEY');

// one message
$r = $ms->sendText('9876543210', 'Hello from my software');
if (!$r['ok']) { error_log('WhatsApp failed: ' . $r['error']); }

// a file (public link) with a caption
$ms->sendFile('9876543210', 'Your invoice is attached', 'https://your-site.com/invoices/INV-1001.pdf');

// many messages - sent one by one, 10-20 seconds apart (keeps your number safe)
$ms->sendMany([
  ['to' => '9876543210', 'message' => 'Dear Ramesh, your order is ready'],
  ['to' => '9123456789', 'message' => 'Dear Suresh, your order is ready'],
], function ($row, $res) { echo $row['to'] . ' => ' . ($res['ok'] ? 'sent' : $res['error']) . "\n"; });

Node.js 18 or newer, no packages. Download mysender-client.cjs below.

Copyconst { MySender } = require('./mysender-client.cjs');   // download it from this page
const ms = new MySender('YOUR_AUTH_KEY', 'YOUR_APP_KEY');

(async () => {
  const r = await ms.sendText('9876543210', 'Hello from my software');
  if (!r.ok) console.error('WhatsApp failed:', r.error);

  // many messages - one by one, 10-20 seconds apart
  await ms.sendMany([
    { to: '9876543210', message: 'Dear Ramesh, your order is ready' },
    { to: '9123456789', message: 'Dear Suresh, your order is ready' },
  ], (row, res) => console.log(row.to, res.ok ? 'sent' : res.error));
})();

Python 3.7 or newer, no packages. Download mysender_client.py below.

Copyfrom mysender_client import MySender          # download it from this page

ms = MySender('YOUR_AUTH_KEY', 'YOUR_APP_KEY')

r = ms.send_text('9876543210', 'Hello from my software')
if not r['ok']:
    print('WhatsApp failed:', r['error'])

# many messages - one by one, 10-20 seconds apart
ms.send_many([
    {'to': '9876543210', 'message': 'Dear Ramesh, your order is ready'},
    {'to': '9123456789', 'message': 'Dear Suresh, your order is ready'},
], lambda row, res: print(row['to'], 'sent' if res['ok'] else res['error']))

Google Sheets → Extensions → Apps Script → paste, save, then use it as a formula or from a loop.

Copyfunction sendWhatsApp(to, message) {
  var res = UrlFetchApp.fetch('https://mysender.mawanta.com/api/create-message', {
    method: 'post',
    payload: { authkey: 'YOUR_AUTH_KEY', appkey: 'YOUR_APP_KEY', to: to, message: message },
    muteHttpExceptions: true
  });
  return res.getContentText();
}
// in a cell: =sendWhatsApp("919876543210", "Hello")   (for many rows use a loop with Utilities.sleep(15000) between messages)

Add an HTTP / Webhook request step: method POST, URL https://mysender.mawanta.com/api/create-message, body type Form (urlencoded), and these fields: authkey, appkey, to, message (map to and message from the previous step, for example the customer’s phone and an order text). Add a delay of 10–20 seconds between messages if the tool loops over many rows.