Datafeed in rails

Hi,
I have to built a search functionality in which whenever the user types
"shoes" then my search result will give him an information about the
most of online shoppers like (Amazon, ebey) who are selling the shoes
with their corresponding prices.
Is anyone knows how should I get the information from these online
shoppers?

Any help appreciated.
Thanks
Mike

Amazon provides an API for this sort of thing. I think eBay does as well.

I do not know if there is a gem for this, or if you would have to use one for each service.

Is there a way through which I can get the information from single
server?
Like "http://www.datafeedfile.com/" which gives the information from
different merchants.
Peter Hickman wrote: