Yeah, it's been down for some time, and I can't let people to use it unless it's 100% reliable, especially when very large payments are involved.

You can use Zapit.live marketplace feature for now; it is 100% reliable. I designed it for digital paywalls, and it also has one of the best marketplaces.

By the way, before using the marketplace, make a demo digital paywall, it will encrypt and save your keys locally. You can also turn it into a PWA