Paywalled tool. It should say so before wasting your time to go and find a URL to test. Dark pattern.
If memory serves I was impressed by kagi's open beta for summary of very large docs but not enough to be teased into signing up for everyday use when it was paywalled. A simple instruction pre-amble to an LLM will probably do the same in few weeks time which is probably why they yanked it. For now I use https://summate.it or perplexity.
