[jsnell]

It absolutely does exist, as can be seen from companies like Startpage and Kagi using that paid API.

But yes, it seems hard to believe that the terms of service for a paid API would allow for caching of results. What this sounds like is Mullvad betting that they can just use their VPN IPs for scraping search results and not be blocked.

Edit: the Leta FAQ claims they're paying for API access, seems unlikely they'd lie about that.