
Reorg-aware Monero (XMR) network metrics, mining-pool centralization and chain reorganizations.
monerometrics API is a free Cryptocurrency API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Live Monero metrics: chain reorganizations, orphan blocks, hashrate, block time, mempool, mining-pool centralization (Nakamoto coefficient) and a chain fork visualizer. Public dashboard + API.
Details from monerometrics.net.

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The monerometrics API is provided by monerometrics (monerometrics.net). Live Monero metrics: chain reorganizations, orphan blocks, hashrate, block time, mempool, mining-pool centralization (Nakamoto coefficient) and a chain fork visualizer. Public dashboard + API.
Yes. The monerometrics 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 monerometrics API requires no authentication, so you can start making requests without signing up.
Yes. The monerometrics API supports CORS, so front-end JavaScript can call it directly.
Yes. The monerometrics API is served over HTTPS, so it's safe to use in production.