Our supply data is now open source! Woohoo! Find here the NPM package. We open sourced the drivers for querying block explorers to get the supply data; like circulating, total and maximum supply.
Use the library to see for example, how much Ethereum is in circulation. You can find how much Ethereum is in the foundation’s hands and how much is burned. Add your own driver to see the correct supply data of your coin on Coinranking.com