On the side bar of your WebEngage account, move to Data Platform > Integration and then select configure on the WhatsApp Setup.
Click on Add WhatsApp Service Providers button in the WhatsApp Service Providers menu and in the dropdown select as Private WSP.
In the modal appeared, Enter a Configuration Name (as per your choice) and WhatsApp business number linked to noApp.
In the URL field enter the following URL : **https://crm.noapp.io/webengage/message.**
In the Request Type select, Send Personalisation Variables.
Select Add Header button and enter the two headers name (or keys) and value as given below (and shown in the picture)
**channelKey -> ‘YOUR CLIENT KEY FROM NOAPP PLATFORM’
apiKey -> ‘YOUR API KEY FROM NOAPP PLATFORM’**