Is it possible to create an app using a database from another site on WP?
I'm not very techy so the title of this thread is probably not technically correct in relation to exactly what I want to do but i'll do my best to explain

I'd like to get a search engine type thing going on my website which will enable my users to search for calories of food. There are a few websites online that have a real good database of foods and was wondering if it was possible to create a custom search engine using their database for my Wordpress site?
I obviously don't want to just "steal" their database and claim it as my own - I'll have all relevant links back to the site. Something like results "powered by caloriesite.com" - and of course i'll seek their permission too.
Is this possible to do if I outsourced it? Seems pretty easy in theory but like I said, I'm not techy so it could be different in practice. Is it a very involved process or relatively simple?
Thanks a lot guys.
Always appreciated
Altug
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