facebookbot #Follow below steps to integrate the api 1.visit https://developers.facebook.com/ 2.create a facebook page 3.Create a app 4. In product list setup Messenger app. 5. Generate Page Access Token by selecting the page created in step 2. 6. Setup webhooks 1. In Callback URL field provide your app link(public host address) 2. In Verify token field provide any random String. 7. select a page and Subscribe that for the app.