Am I understanding this correct in that you can basically automate monetizing your web/api content to everyone or just agents ? Because I would be very much in support of charging agents per request, but I would want to still offer humans a free experience.

Depends on the website though. I want LLMs to scrap my B2B website, because then it's shown to the user and they will likely use my product afterwards

If not built-in, you can probably put it together through Cloudflare itself.

If a request goes to the protected path, if detected as bot: hard HTTP redirect to the path set in the monetization gateway, if human: allow and don't redirect.

Unless you have people's biometric data, you won't be able to separate agents from people. Except by payment.