It should work without JS. It even works in eww (in Emacs). Looking at the sourc...

jorams on Sept 21, 2023 | parent | context | favorite | on: Unlimited Kagi searches for $10 per month

It should work without JS. It even works in eww (in Emacs). Looking at the source of the page, there's a redirect (meta http-equiv="refresh") wrapped in a <noscript>-tag to the same URL but with "/html" before the path.[1]. It seems the browser you tried doesn't handle that.

[1]: https://kagi.com/html/search?q=what+is+%25&r=no_region&sh=Qd...

autoexec on Sept 21, 2023 [–]

You're right! The browser doesn't do redirects by default. looks like I'll need more coffee...