Receive WordPress post comments to whatsapp:n8n automation

So I tried to create a small automation where I get WordPress post comments directly in my WhatsApp messages whenever anyone comments on any of my WordPress blog posts.

I used a Webhook and an HTTP Request node. As I understood it, the Webhook is a listener/receiver that receives data. When a comment is made on my WordPress site, the comment is sent to the Webhook using this code:

add_action('wp_insert_comment', function($comment_id, $comment) {
    $data = [
        'author' => $comment->comment_author,
        'email' => $comment->comment_author_email,
        'content' => $comment->comment_content,
        'post' => get_the_title($comment->comment_post_ID),
        'date' => $comment->comment_date
    ];
    wp_remote_post('https://n8n.example.com/webhook/wp-comment', [
        'method'  => 'POST',
        'body'    => json_encode($data),
        'headers' => [
            'Content-Type' => 'application/json'
        ],
    ]);
}, 10, 2);

The Webhook receives it in JSON format like this:

json

{
  "author": "John",
  "content": "Nice post!",
  "post": "Hello World"
}

The HTTP Request node is essentially an API caller — it gets data from the Webhook and forwards it to another server. In my case, it instructs Meta to send a WhatsApp message using:

So in summary, the Webhook is the data receiver and the HTTP Request is the data forwarder.

Issue I faced: The access token expired after some time, which caused the automation to stop working.

However, I’m happy that it worked — messages were coming through successfully until the access token expired!