Just compared a few coins from coinbin to
http://coincap.io/front/ and the prices seem to differ, so my initial instinct is to say no, but dev feedback would be great :)
EDIT: Just looked through the source of the project, and they source their info from https://coinmarketcap-nexuist.rhcloud.com/api/all, which is indeed built on top of the coinmarketcap API.
