
Interaction with the Ethereum mainnet and several testnets.
INFURA Ethereum API is a free Cryptocurrency API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Fast, high availability Ethereum infrastructure. Connect your app instantly, with a single line of code.
Details from infura.io.

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Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
The INFURA Ethereum API is provided by Infura (infura.io). Fast, high availability Ethereum infrastructure. Connect your app instantly, with a single line of code.
Yes. The INFURA Ethereum 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 INFURA Ethereum API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The INFURA Ethereum API supports CORS, so front-end JavaScript can call it directly.
Yes. The INFURA Ethereum API is served over HTTPS, so it's safe to use in production.