Not sure how to answer about central banks or parallel market, but I'm using the API of CryptoCompare.com for instance, the euro price is being accessed at 

https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=EUR

bitcoin

fiat currencies added to satoshi bitcoin converter

crrdlx

Not sure how to answer about central banks or parallel market, but I'm using the API of CryptoCompare.com for instance, the euro price is being accessed at https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=EUR