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Free utility APIs: timezone, forex rates, crypto prices, page metadata

Exchange rates and currency conversion.
Bank of Russia API is a free Currency Exchange API that requires no API key, is served over HTTPS and has unconfirmed CORS support.

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Free utility APIs: timezone, forex rates, crypto prices, page metadata
Free currency API with over 150 currencies
Real-time and historical currency exchange rates with free tier
Provides current and historical currency exchange rates with free plan 1K requests/month
Yes. The Bank of Russia API is listed in the Currency Exchange 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.
No. The Bank of Russia API requires no authentication, so you can start making requests without signing up.
CORS support for the Bank of Russia API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Bank of Russia API is served over HTTPS, so it's safe to use in production.