Getting started

1. Connect a WhatsApp number. In the panel open Connection and follow Connect your number. The API sends from your connected numbers.

2. Create an API key. Open Developer → API keys → Create a key. Give it a name (for example “Website”) and, if you like, limit it to one WhatsApp number. Copy the key — it starts with mk_live_ and is shown only once.

3. Find an approved template. Business-initiated messages must use a template approved by Meta. List yours:

   curl https://login.meapi.in/api/v1/templates \
     -H "Authorization: Bearer mk_live_your_key"

4. Send it. Replace the phone number with yours (international format) and the template name with one from the list.

   curl

   curl https://login.meapi.in/api/v1/messages \
     -H "Authorization: Bearer mk_live_your_key" \
     -H "Content-Type: application/json" \
     -d '{
       "to": "+919812345678",
       "type": "template",
       "template": { "name": "hello_world", "language": "en_US" }
     }'

   Node.js

   const res = await fetch('https://login.meapi.in/api/v1/messages', {
     method: 'POST',
     headers: { Authorization: `Bearer ${process.env.MEAPI_KEY}`, 'Content-Type': 'application/json' },
     body: JSON.stringify({ to: '+919812345678', type: 'template', template: { name: 'hello_world', language: 'en_US' } }),
   });
   console.log(res.status, await res.json());

   PHP

   <?php
   $ch = curl_init('https://login.meapi.in/api/v1/messages');
   curl_setopt_array($ch, [
     CURLOPT_POST => true,
     CURLOPT_RETURNTRANSFER => true,
     CURLOPT_HTTPHEADER => ['Authorization: Bearer ' . getenv('MEAPI_KEY'), 'Content-Type: application/json'],
     CURLOPT_POSTFIELDS => json_encode(['to' => '+919812345678', 'type' => 'template', 'template' => ['name' => 'hello_world', 'language' => 'en_US']]),
   ]);
   $body = curl_exec($ch);
   echo curl_getinfo($ch, CURLINFO_HTTP_CODE), ' ', $body;

   Python

   import os, requests
   
   r = requests.post(
       "https://login.meapi.in/api/v1/messages",
       headers={"Authorization": f"Bearer {os.environ['MEAPI_KEY']}"},
       json={"to": "+919812345678", "type": "template", "template": {"name": "hello_world", "language": "en_US"}},
       timeout=30,
   )
   print(r.status_code, r.json())

   A 202 Accepted response means MeAPI queued the message for WhatsApp:

   {
     "success": true,
     "message": { "id": 81234, "wamid": null, "status": "pending", "type": "template", "to": "+919812345678", "error": null, "created_at": "2026-10-26T10:15:02.000Z" },
     "conversation_id": 5521,
     "contact_id": 3310
   }

5. Check delivery. Poll GET /messages/{id} or, better, add a webhook for message.status events.

Next steps

• When the customer replies, the 24-hour window opens and you can send free-form text, media and buttons.
• Keep your CRM in sync with contacts.
• Read about errors and rate limits before going live.