
Cryptocurrencies Prices.
CoinMarketCap API is a free Cryptocurrency API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Use CoinMarketCap's crypto API to get the best, most accurate real-time, historical cryptocurrency, DEX and exchange trade data for Bitcoin, Ethereum and more.
Details from coinmarketcap.com.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Live executed whale trades across 15 exchanges and on-chain DEX with an unusualness radar
The CoinMarketCap API is provided by coinmarketcap.com (coinmarketcap.com). Use CoinMarketCap's crypto API to get the best, most accurate real-time, historical cryptocurrency, DEX and exchange trade data for Bitcoin, Ethereum and more.
Yes. The CoinMarketCap API is listed in the Cryptocurrency category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The CoinMarketCap API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the CoinMarketCap API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The CoinMarketCap API is served over HTTPS, so it's safe to use in production.