Searchable attack surface database of the entire internet.
FullHunt API is a free Security API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.

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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 industry’s first hacker API that helps increase productivity towards creative bug bounty hunting
Yes. The FullHunt API is listed in the Security 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 FullHunt API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the FullHunt API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The FullHunt API is served over HTTPS, so it's safe to use in production.