Automatically send object to every res.render()

I have a config object that I want to use in pretty much every view on my express appplication. It looks something like this:

{
  "url" : "http://whatever.com",
  "more" : "yadda yadda"
}

I want to have is accessible to all my views so I can easily reference config.url

Problem is that I don't want to pass this variable every time I do a res.render('viewname')

With express, is it possible to just always have this available? Am I even doing this right or does express have something for this already?

If the properties are static (the same for all requests), use app.locals.

app.locals = {
  "url" : "http://whatever.com",
  "more" : "yadda yadda"
};

Variables set with app.set() are automatically accessible through settings.x in a view. See the docs.