get content from json api to post

why are you using plugin to fetch data, simply use the jqeury ajax function or jquery get method save the data into the wordpress post. like:-

 $.get( "https://api.hasoffers.com/v3/Affiliate_Affiliate.json?Method=getAccountManager&api_key=MY_API_KEY&NetworkId=SAMPLE", function( data ) {

  do what ever you to with data, insert to post or whatever    
});