IPN Overview :

PayPal Instant Payment Notification is a call back system that will get initiated once a transaction is completed(eg: When ExpressCheckout completed successfully).
You will receive the transaction related IPN variables on your IPN url that you have specified in your request.
You have to send these IPN variables back to PayPal system for verification. Upon verification, PayPal will send a response string with "VERIFIED" or "INVALID".
If your server fails to respond with a successful HTTP response, PayPal will resend this IPN either until a success is received or up to 16 times.

How to run?

IPN Listener script samples are provided for different languages.
Deploy IPN Listener script in Cloud environment or you can expose your server port using any third party LocalTunneling software, so that you can receive PayPal IPN call back.
Make a PayPal API call (eg: DoDirect Payment request), setting the IpnNotificationUrl field of the API request class to the url of deployed IPN Listener script.
You will receive IPN call back from PayPal.

Name		Name	Last commit message	Last commit date
Latest commit History 29 Commits
asp		asp
coldfusion		coldfusion
perl		perl
php		php
visual_basic		visual_basic
LICENSE.txt		LICENSE.txt
README.md		README.md