Possible to connect to Upnote?

I managed to find some info about the upnote://x-callback-url scheme by looking at the source code to its Chrome web clipper. So here is an improved version:

#popclip - upnote v2
name: UpNote
icon: U
capture html: true
javascript: | 
  const article = {
    html: popclip.input.html,
    title: popclip.context.browserTitle,
    url: popclip.context.browserUrl
  }
  const encoded = encodeURIComponent(JSON.stringify(article))
  popclip.openUrl('upnote://x-callback-url/clipper?article=' + encoded)

(The above block is an extension snippet - select it to install the extension with PopClip)

Let me know if it works well for you.