Question

Is there any way use Tampermonkey’s API in Chrome’s JavaScript console?

I want to mess with functions like GM_xmlhttpRequest() and GM_listValues().

Answer 1

1. Create the following script:

   // ==UserScript==
   // @name       Exports some GM functions
   // @namespace  Whatever
   // @match      *
   // ==/UserScript==
   // WARNING: Any page can now use these methods! Be careful,
   // or change "@match *" to "@match https://example.com" and
   // visit https://example.com to test the API.
   unsafeWindow.GM_xmlhttpRequest = GM_xmlhttpRequest;
   unsafeWindow.GM_listValues = GM_listValues;
   

2. Open any page where Tampermonkey can be activated ( https://stackoverflow.com/ for instance).

3. Open the Developer tools -> Console.
4. Done, you can now do whatever you want with the exported methods (from step 1).