CoinDesk is an information center on Bitcoins, a decentralized digital currency used around the world. One service that CoinDesk provides is the Bitcoin Price Index (BPI). This Bitcoin pricing data is calculated every minute and is published in USD, EUR, and GBP. BPI data is made available programmatically via REST API. People can use the API however they like as long as they credit CoinDesk as the data source.
ProgrammableWeb's series on cryptocurrency and blockchain technologies aims to give you a sense of the various components and business opportunities within the various cryptocurrency ecosystems. Now, let's take a look at a small handful of typical APIs across those ecosystems.