Offerwall Postback Integration for Wordpress with Mycred

I am looking for someone who got deep knowledge in creating postback scripts for the following offerwalls (adgatemedia, wannads, kiwiwall, ayetstudios, offerdaddy, adworkmedia, cpx research, cpalead, ogads) that will credit points to my wordpress users, using mycred. All offerwalls are displayed as an iframe within a page of wordpress. These offerwalls are only visible to already registered / logged in users via the ultimatemember plugin. Once the user clicks on any offers, the subid must be passed to the offerwall to later identify the user. When the offerwall confirms a conversion, it must be returned via postback. That conversion then must credit points (credits) to the user via the mycred plugin. For that we need to create a custom reference (NameOfTheOfferwall_conversion) within mycred and then use code: mycred_add( 'NameOfTheOfferwall_conversion', $user_id, "amount of points depending on the conversion", 'Points for NameOfTheOfferwall conversion', 'subid' ); [login to view URL] As many data as possible should be included within the mycred_add Like {payout} , {ip_address}, {country_iso} and so on. I could create a testing environment (wordpress installation), for this project. Preferred I would like the postbacks to be integrated as a plugin, but separated php files for each offerwall are fine aswell. Please also keep security and logging in mind and guide me how to secure these postbacks scripts, so that no user will be able to read the php files or abusing the system to be granted with points they should not deserve.