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https://www.nowapi.com/api/finance.rate  
https://api.fixer.io/latest?base=USD   每天更新 
https://currencylayer.com/product  每小时更新
https://www.okex.com/rest_api.html  

https://www.bloomberg.com/quote/USDCNY:CUR  实时汇率

6886a3e7-4292-46eb-8ca5-207d9631e166 

A697D8115098C08CBC8844594CB2ED12 

https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=CNY   直接计算就可以 相信coinmarketcap 

https://api.coinmarketcap.com/v1/ticker/?start=0&limit=1000&convert=CNY  

[
{
id: "bitcoin",
name: "Bitcoin",
symbol: "BTC",
rank: "1",
price_usd: "18740.6",
price_btc: "1.0",
24h_volume_usd: "13077300000.0",
market_cap_usd: "313878101017",
available_supply: "16748562.0",
total_supply: "16748562.0",
max_supply: "21000000.0",
percent_change_1h: "-0.13",
percent_change_24h: "-3.07",
percent_change_7d: "14.98",
last_updated: "1513567754",
price_cny: "123933.46186",
24h_volume_cny: "86481492630.0",
market_cap_cny: "2075707269837"
}
]

https://api.coinmarketcap.com/v1/ticker/?limit=8000&convert=CNY