WhatsApp API Integration: Website, WooCommerce & CRM

The integration model

Every integration below uses the same two building blocks: a REST endpoint to send a message (POST /api/external/send-message with your API key), and an optional per-device webhook that pushes incoming replies to your system. Anything that can fire an HTTP request — code, plugins, or automation tools — can integrate.

Website forms → WhatsApp

The highest-value first integration: when someone submits your contact or enquiry form, your form handler makes one API call to (a) alert your sales team’s WhatsApp instantly and (b) send the lead a confirmation. Leads answered in the first minutes convert at a completely different rate than ones answered hours later.

// in your form submit handler
await fetch('https://app365.my/api/external/send-message', {
  method: 'POST',
  headers: { 'Authorization': 'Bearer YOUR_API_KEY', 'Content-Type': 'application/json' },
  body: JSON.stringify({
    device_token: 'your-device-token',
    recipient: lead.phone,          // e.g. '60123456789'
    message: `Hi ${lead.name}, thanks for your enquiry! We'll be in touch shortly.`,
  }),
})

WooCommerce → WhatsApp order updates

Hook WooCommerce’s order status changes and send a WhatsApp update at each step. A minimal PHP hook in your theme or a small plugin:

add_action('woocommerce_order_status_processing', function ($order_id) {
  $order = wc_get_order($order_id);
  $phone = preg_replace('/\D/', '', $order->get_billing_phone()); // normalise
  wp_remote_post('https://app365.my/api/external/send-message', [
    'headers' => [
      'Authorization' => 'Bearer YOUR_API_KEY',
      'Content-Type'  => 'application/json',
    ],
    'body' => json_encode([
      'device_token' => 'your-device-token',
      'recipient'    => $phone,
      'message'      => 'Order #' . $order->get_order_number() . ' confirmed! We are preparing it now.',
    ]),
  ]);
});

CRM and no-code automation

• CRM: trigger follow-ups when a deal stage changes — one HTTP action in your CRM’s workflow builder
• Automation platforms (Make, n8n, Zapier-style tools): use the generic HTTP/webhook module to call the send endpoint — no code at all
• Google Sheets: an Apps Script loop can send personalised messages from a sheet of contacts
• Incoming webhook → CRM: auto-create a lead whenever a new WhatsApp enquiry arrives

Integration hygiene

• Normalise phone numbers to international format (60…) before sending
• Send transactional updates from a different number than marketing blasts
• Log every API response; queue and retry failures in your own system
• Message only customers who gave their number expecting contact