Webhook subscriptions — WhatsApp Meta

POST https://app.sendapp.ai/api/whatsapp-meta/webhooks

Subscribes (POST) another address to the same events as the status webhook: incoming messages, Meta statuses and «message_sent». It is meant for tools that connect by themselves, like n8n's SendApp Trigger node, without removing the address registered with set_webhook. GET lists the subscriptions, DELETE /api/whatsapp-meta/webhooks/{id} removes one.

Up to 10 subscriptions per WhatsApp number. Subscribing the same address again returns the same subscription.

Parameters

4 · 3 required

apikey required

Your API Key.

token required

Account token.

url required

The address that receives the events (https or http). POST only.

label optional

A name to recognise the subscription, for example «n8n». POST only.

Need help with the integration? info@sendapp.live

Request

# Subscribe an address
curl -X POST 'https://app.sendapp.ai/api/whatsapp-meta/webhooks' \
  -H 'X-API-Key: YOUR_API_KEY' -H 'Content-Type: application/json' \
  -d '{ "token": "YOUR_ACCOUNT_TOKEN", "url": "https://your-server.com/webhook", "label": "n8n" }'

# List the subscriptions
curl 'https://app.sendapp.ai/api/whatsapp-meta/webhooks?token=YOUR_ACCOUNT_TOKEN' -H 'X-API-Key: YOUR_API_KEY'

# Remove the subscription
curl -X DELETE 'https://app.sendapp.ai/api/whatsapp-meta/webhooks/wh_xxxxxxxxxxxxxxxxxxxx?token=YOUR_ACCOUNT_TOKEN' -H 'X-API-Key: YOUR_API_KEY'

<?php
// Subscribe an address
$ch = curl_init('https://app.sendapp.ai/api/whatsapp-meta/webhooks');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['X-API-Key: YOUR_API_KEY', 'Content-Type: application/json'],
    CURLOPT_POSTFIELDS => json_encode([
        'token' => 'YOUR_ACCOUNT_TOKEN',
        'url'   => 'https://your-server.com/webhook',
        'label' => 'n8n',
    ]),
]);
echo curl_exec($ch);
curl_close($ch);

// Subscribe an address
const res = await fetch('https://app.sendapp.ai/api/whatsapp-meta/webhooks', {
  method: 'POST',
  headers: { 'X-API-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' },
  body: JSON.stringify({ token: 'YOUR_ACCOUNT_TOKEN', url: 'https://your-server.com/webhook', label: 'n8n' })
});
console.log(await res.json());

Response

{
  "status": "success",
  "webhook": {
    "id": "wh_k2m9x0q7c1v8b3n6z5a4",
    "url": "https://your-server.com/webhook",
    "label": "n8n",
    "created_at": "2026-10-28T12:30:18+00:00"
  }
}

{
  "status": "error",
  "message": "This WhatsApp number already has 10 webhook subscriptions: remove one first."
}