How to Add Messenger Platform to Your Facebook App

Add the Messenger Platform to your Facebook app

Click the 'Product' button.

Add Product

From the product list page click on the 'Set Up' button on the 'Messenger' product. The Messenger Platform will be added to your app, and the messenger settings console will be displayed.

Set Up Messenger Platform

Configure the Messenger For Your App

In the ‘Webhooks‘ section of the Messenger settings console, click the ‘Add Subscription’. This will subscribe your app to receive webhook events for the Page.

Webhooks on Messenger Settings

On the pop-up subscription, choose ‘messages’, ‘message_deliveries’ and ‘messaging_postbacks’ to get started. Click the 'Save‘ button

Subscription Fileds

Add subscription messenger is successful.

Subscription Messenger

On the permission and features page, click ‘Request Advanced Access’ on page_messaging.

Add to Submission

After that, all you have to do is wait for Facebook's response to your request.

To know the difference between standard and advanced access, you can refer to this page.