This page illustrates how hCaptcha auto-verification works. It contains a simple HTML code with hcaptcha
shortcode inside.
Nothing else is required from the user. The plugin verifies the user response to the hCaptcha challenge on the server-side automatically.
Additionally, this hCaptcha is invisible.
<form method="post">
<input type="text" name="test_input">
<input type="submit" value="Send">
[hcaptcha auto="1"]
</form>