Paypal has released a Github Repository which contains sample codes for IPN Listeners. You may check out the Github Repo at: https://github.com/paypal/ipn-code-samples You can find the IPN PHP Class below: And the IPN Listener example: I’m using paypal subscriptions: https://developer.paypal.com/docs/business/subscriptions/ But I can’t find the place where I can specify the IPN Listener url. Any ideas? Thanks. Similar question here: