Here are some useful links for coinmarketcap etc itegration:

Last DGC/BTC price on alcurEX with api:
https://alcurex.org/api/market.php?pair=dgc_btc&last=last

Last 24h DGC volume on alcurEX exchange:
https://alcurex.org/api/market.php?currency=DGC&interval=24

DGC Trading history:
https://alcurex.org/api/market.php?pair=DGC_BTC&history=on&limit=10000

http://i.imgur.com/PeGCkdp.png
ALCUREX is an online cryptocurrency exchange registered in Finland.