How do I scrap the current webpage URL in a CSV file?

How to copy the current webpage URL in a CSV file?

I tried this but it doesn’t work? what am I doing wrong?

{
  "Name": "URL",
  "CreationDate": "2020-12-1",
  "Commands": [
    {
      "Command": "open",
      "Target": "https://www.yelp.com/biz/kc-paving-redwood-city-3?osq=paving+contractors",
      "Value": ""
    },
    {
      "Command": "store",
      "Target": "${!URL}",
      "Value": "!clipboard"
    },
    {
      "Command": "echo",
      "Target": "${!clipboard}",
      "Value": "!csvline"
    },
    {
      "Command": "csvSave",
      "Target": "url",
      "Value": ""
    }
  ]
}

There is no need to use the clipboard. This should work:

{
  "Name": "URL",
  "CreationDate": "2020-12-1",
  "Commands": [
    {
      "Command": "open",
      "Target": "https://www.yelp.com/biz/kc-paving-redwood-city-3?osq=paving+contractors",
      "Value": ""
    },
    {
      "Command": "store",
      "Target": "${!URL}",
      "Value": "!csvline"
    },
    {
      "Command": "csvSave",
      "Target": "url",
      "Value": ""
    }
  ]
}