Page

Page works in conjunction with count.  If you're not also using count, things won't work properly.  If you specify a count of 10 and a page of 2, you'll get back the results numbered 11-20.  Here is a typical example of grabbing the second page of a blog archive:

{'type':'post','parent':{'type':'feed','url':'/blog'},'orderBy':'-publishedAt','count':10,'page':2}

Currently there is no indicator that comes back that will tell you if there is an additional page after the current one.