> The internet was made for humans exclusively, designed to keep machines out by default.

The internet is also not made for humans. For years I've wanted something like this for e2e testing or personal scripts (cron etc) and your UX is by far the simplest.

I love AgentMail. It's made email dead simple for agents and testing any paths for email. I even have a /agent-mail skill I use for when I want a design doc or artifact emailed to me.

That said, agent self sign up seems like a novelty. Setting up account programmatically via curl is however useful. I imagine most customers -- especially those willing to pay for your paid tier -- would provision accounts ahead of time or reuse them.

Free for all account creation could be an option but it will attract spammers and their ilk. Your reputation may end up in the toilet which would also break agent mail for me.

No bueno.