Free Foreign exchange rates API

https://api.exchangeratesapi.io/latest?symbols=USD,CNY

{"rates":{"CNY":7.6045,"USD":1.084},"base":"EUR","date":"2020-02-25"}

https://api.coindesk.com/v1/bpi/currentprice.json

{"time":{"updated":"Feb 26, 2020 14:33:00 UTC","updatedISO":"2020-02-26T14:33:00+00:00","updateduk":"Feb 26, 2020 at 14:33 GMT"},"disclaimer":"This data was produced from the CoinDesk Bitcoin Price Index (USD). Non-USD currency data converted using hourly conversion rate from openexchangerates.org","chartName":"Bitcoin","bpi":{"USD":{"code":"USD","symbol":"$","rate":"8,981.1483","description":"United States Dollar","rate_float":8981.1483},"GBP":{"code":"GBP","symbol":"£","rate":"6,943.3258","description":"British Pound Sterling","rate_float":6943.3258},"EUR":{"code":"EUR","symbol":"€","rate":"8,265.7909","description":"Euro","rate_float":8265.7909}}}

reference:
https://exchangeratesapi.io/
https://www.coindesk.com/coindesk-api