I've done this off and on for various sites over the years too, and probably should be more consistent about it. A number of sites do or used to do some variati

I've done this off and on for various sites over the years too, and probably should be more consistent about it. A number of sites do or used to do some variation of this, and I wish it was more widespread. E.g. Reddit will serve up a json version of a sub-dreddit if you do /r/subreddit.json