574154 Wordpress Plugin Needed Integrates With Autoresponders

I'm looking for a software that will require Wordpress plugins that are uploaded to require a product key for activation and use. In order to get the product key a person will have to subscribe to a autoresponder mailing list that automatically sends out the proper product key. For example: From a visitor's standpoint. Let's say I download a Wordpress plugin. In order for the plugin to be installed and ACTIVATED for use, I need a product key. Once I have it I can successfully activate and use my plugin. In order to get the key I must subscribe and be sent the key via email. There are a few autorepsonders this software must work with. So knowing their system's API is crucial. These autoresponders include: aweber, icontact, & getresponse Let me know if this is possible or if you don't understand due to my poor explanation.