Messenger
Learn to set up a Facebook Messenger communication channel for your application in your NLX workspace
If you don't already have a Facebook page for your application to connect to, create one on Facebook (https://facebook.com). Once your page is in place, set up Messenger before creating a channel.
Step 1: Set up Messenger
To generate the other necessary properties to get your application up and running with Messenger, first create a Messenger product:
Navigate to your Facebook App on https://developers.facebook.com. Scroll down to the Products section and choose Messenger for Set Up
Step 2: Generate Page access token
On your Facebook App's page, click Add or Remove Pages

Navigate to your app's page and choose the Facebook page you want to link your application to
Follow the steps in the pop-up
After the page is added, click Generate Token
Copy the token from the popup > Click Done
Step 3: Generate Verify token
You may use any method to generate this string. We recommend using a password generator such as https://www.lastpass.com/password-generator
Step 4: Create Messenger channel
Navigate to Channels tab of your application
Expand Messenger option
Select + Create channel
Enter Verify token
Enter Page access token
Click Create channel
Before proceeding to Step 5, create a build and deploy your application.
Step 5: Post deployment
After deploying your application, make note of the application's URL by expanding the Details link beside your Deployed status. Expand the Messenger section in the popup modal > Copy the Bot URL
On your Facebook App's page, scroll to the Webhooks section > Click Add Callback URL
Enter the bot's URL into the Callback URL field. Then enter the Verify token value you created into the Verify Token field

Click Verify and Save
On your Facebook App's page, scroll to the App Review for Messenger section > Select to add the pages_messaging permission
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