Well, i love to play with these APIs, i could help you if you find any problem, just PM me.
I suggest to add LISK, WAVE, LITECOIN, DASH, because they are promissing coins, with great concepts, except for litecoin, but it is interesting to watch this coin because since some weeks, things are mooving.

You can use this API : https://www.cryptocompare.com/api
You will have a phenomenous amount of informations, great tool for watching websites, trackers, price queries.