monerometrics
Reorg-aware Monero (XMR) network metrics, mining-pool centralization and chain reorganizations
Automated cryptocurrency exchange service.
Nexchange API is a free Cryptocurrency API that requires no API key, is only available over HTTP and supports CORS, so it can be called from the browser.

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Reorg-aware Monero (XMR) network metrics, mining-pool centralization and chain reorganizations
NovaDAX API to access all market data, trading management endpoints
Cryptocurrency exchange based in Seychelles
Yes. The Nexchange 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 Nexchange API requires no authentication, so you can start making requests without signing up.
Yes. The Nexchange API supports CORS, so front-end JavaScript can call it directly.
No. The Nexchange API is only available over plain HTTP, which browsers block on HTTPS sites. Call it from a server instead.