Example (ql.io)

conf.ql

ids = select itemId from ebay.finding.itemsbykeywords where keywords = '{q}' limit 5;
items = select ItemID, Location, GalleryURL from ebay.shopping.singleitem 
        where itemId = '{ids}';
bestOffers = select GetBestOffersResponse.BestOfferArray from ebay.trading.bestoffers 
        where itemId = '{ids}';
bidders = select GetAllBiddersResponse.BidArray from ebay.trading.getallbidders 
        where itemId = '{ids}';
return {
  "user" : "{user}",
  "item" : "{items}",
  "bidders" : "{bidders}",
  "bestOffers" : "{bestOffers}"
} via route '/itemDetails/{q}' using method get;