Yes you'll need a python resource for this.
To get the url of your endpoint, right click on it in the project browser, and select "copy mounted path"
It will give you something that looks like this:
/system/webdev/{project_name}/{ressource_name}
Append this to your gateway's address to get the full url:
example with a local dev gateway, a webdev resource named 'foo' on a project named sandbox:
http://localhost:8088/system/webdev/sandbox/foo