To use the hCaptcha block, first you'll need to go to www.hcaptcha.com and create an account.

By default, when you create an account, you'll automatically get both a Secret Key and a Site Key, but you can create more Site Keys for each different site you want to use hCaptcha.

Then, simply drop the block in your page, put your Site Key in the block's SiteKey parameter, and create a handler for the ResponseReceived event.

In this handler, call the ValidateReponse client action, put your Secret Key in its SecretKey parameter, and the handler's input parameter ReponseToken in the

action's ResponseToken parameter.

And that's it.

See the hCaptchaReactDemo module for a working example!