Is using a webhook mandatory? January 19, 2022 16:46 It is not mandatory, so please use it according to the request of the member store. If you want to use it, please contact PayPay with the endpoint you would like to receive the webhook from. Related articles What event will the webhook be delivered to? Please provide the IP address of Webhook notification source server. What types of webhooks does PayPay notify? Is the webhook always delivered? How to refund? Comments 0 comments Please sign in to leave a comment.