Comment by cxr

Why even require that? If the data in question is available over HTTP, it should be as easy as opening a page from the relevant origin in a browser tab, optionally opening a second tab for a "Warrior Dashboard", then invoking a bookmarklet on the former to slurp up data by XHR &tc. (If it's necessary to cross origins as the thing roves around, the dashboard can alert you to this while it continues doing what it can with the first origin. Just have the human return to the dashboard from time to time and repeat the second step to run as many in parallel as they want.)