
Cryptocurrencies Prices.
WorldCoinIndex API is a free Cryptocurrency API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Cryptocoin price API, prices denoted in USD, EUR, CNY, GBP, RUB
Details from worldcoinindex.com.

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The WorldCoinIndex API is provided by WorldCoinIndex (worldcoinindex.com). Cryptocoin price API, prices denoted in USD, EUR, CNY, GBP, RUB
Yes. The WorldCoinIndex 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 WorldCoinIndex API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the WorldCoinIndex API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The WorldCoinIndex API is served over HTTPS, so it's safe to use in production.