Provides API endpoints for thousands of crypto assets.
Messari API is a free Cryptocurrency API that requires no API key, is served over HTTPS and has unconfirmed CORS support.

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.
Reorg-aware Monero (XMR) network metrics, mining-pool centralization and chain reorganizations
Crypto futures prices, candles, funding, open interest, long/short and liquidations, 9 exchanges
Yes. The Messari 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.
No. The Messari API requires no authentication, so you can start making requests without signing up.
CORS support for the Messari API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Messari API is served over HTTPS, so it's safe to use in production.