Amazon product stock check

I need to a web application where I can upload a text or csv file that has a list of Amazon ASIN (products) The tool needs to find each item on Amazon and log the -buybox owner - selling price (including shipping)- inventory -featured sellers - selling price (including shipping) - inventory I need results on sceen in basic format and available via csv download. please advise method you intend to use (Advertising api, mws, etc)