Integration of Offerwall along with Callback/Pingback/postback URL setup

I need to setup/integrate 20 Offerwalls in my website along with set up a callback/pingback URL for offerwall (CPALead, TrialPay, PeanutLabs, Paymentwall, OfferToro, AdGateRewards etc.) for my website. When the user completes an offer on an offerwall, the offerwall will send a request using callback/pingback to offerwall owner website and user is credited. My website has already inbuilt inventory for offerwall integration and no coding/programming/development is required. Just need to configure the postback/callback URL with few tracking variable in my admin panel from the offerwall website. I will provide login details for each offerwall website. Need to test callback URL successfully. Also, each website has it own API/postback integration documentation which will help. Must be familiar with Offerwalls, Setting up CallBack/Pingback urls, Paid to click sites. It will not tack more than 5 minutes to integrate each offerwall for an experianced person.