Sidebar Menu & Aircopy Workflow using (other) page data?

I would like to copy a url with parameters through Aircopy onto the clipboard. The Sidebar menu is in the header but the parameters are in search boxes on the page. I cant find a way how I can access the content of those search boxes through the sidebar menu workflow. I can create the string but how can I get it “from the page into the header”?

Thank you for help.