Does anyone know if it's legal to use Google suggestqueries in a commercial product ?
As I'm using the open stream of the ajax jsonp request https://suggestqueries.google.com/complete/search?callb.... in searchengine based product.
No - it can't be legally used and the search team changes the endpoint every now and then so apps can't abuse it , however there are wrapper services which emulate / Gather data from the endpoints through their own means - http://keywordtool.io/api is an example of that