
Free email validation: MX check, disposable detection, syntax.
Kiprio Email Validate API is a free Email API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Validate email addresses in real time. Detects disposable domains, role-based addresses, free providers, and typos. JSON API. Free tier available.
Details from kiprio.com.

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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 Kiprio Email Validate API is provided by kiprio.com (kiprio.com). Validate email addresses in real time. Detects disposable domains, role-based addresses, free providers, and typos. JSON API. Free tier available.
Yes. The Kiprio Email Validate API is listed in the Email 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 Kiprio Email Validate API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Kiprio Email Validate API supports CORS, so front-end JavaScript can call it directly.
Yes. The Kiprio Email Validate API is served over HTTPS, so it's safe to use in production.