Sending Pings with Membership to control another WordPress Site? (Add/Remove members etc.)

Is there a place some knows of that has instructions on how to Control WordPress functions with Pings.

For example: Sending Pings to Add or Remove Members in another WordPress Site.

Ideally I would like a resource with coding that can be used for all things that could possibly be controlled in WordPress with pings form the Membership plugin.

At the moment I want to be able to Ping another WordPress install with the Membership plugin to add a member at a certain Membership level. Creating and deleting would be a start, but choosing, upgrading, downgrading or deleting member in a different WP install would be the end goal.