HackerOne
The industry’s first hacker API that helps increase productivity towards creative bug bounty hunting
A REST API to access high level cryptographic functions and methods.
Hashable API is a free Security API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.

Unified API suite · now live
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 Hashable 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.
No. The Hashable API requires no authentication, so you can start making requests without signing up.
Yes. The Hashable API supports CORS, so front-end JavaScript can call it directly.
Yes. The Hashable API is served over HTTPS, so it's safe to use in production.