If there is an error sending your server an IPN, we will retry up to 10 times. You can also set an IPN URL in your Buy Now and Cart buttons that will be used instead of this one. See the "Authenticating IPNs" section for more details.Īt the same time you can optionally set an IPN URL this is the URL that will be called when sending you IPN notifications. Our system will not send any IPNs unless you have an IPN Secret set. Your IPN Secret is a string of your choosing that is used to verify that an IPN was really sent from our servers (recommended to be a random string of letters, numbers, and special characters). The first step is to go to the My Settings page and set a IPN Secret. It is implemented by making a standard HTTP POST (application/x-www-form-urlencoded) call over a or URL to a script or CGI program on your server. This is a easy and useful way to integrate our payments into your software to automate order completion, digital downloads, accounting, or whatever you can think up. The IPN system will notify your server when you receive a payment and when a payment status changes.
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