Something I just cobbled together:

   curl http://api.4chan.org/b/res/423418552.json | python -mjson.tool
   curl http://api.4chan.org/b/res/423418552.json | json_pp

Example for grabbing a thread and prettyprinting the JSON of it.

Because, you know, we need more 4chan in the house.

(EDIT: brief skimming of the comments indicates it may be semi-offensive, so be warmed. We're skimming /b/, after all.)