The Official WhatsApp Business API.

const axios = require('axios');

async function sendWhatsAppTemplate(to, template) {
  const payload = {
    messaging_product: "whatsapp",
    to: to,
    type: "template",
    template: {
      name: template,
      language: { code: "en_US" }
    }
  };

  const response = await axios.post(
    'https://api.connektly.in/v1/messages', 
    payload,
    { headers: { Authorization: `Bearer ${API_KEY}` } }
  );
  return response.data;
}