mine

os.loadAPI("json")
str = http.get("https://www.nightdev.com/hosted/obschat/?theme=bttv_dark&channel=ruschgaming&fade=30&bot_activity=true&prevent_clipping=false
").readAll()
obj = json.decode(str)
value = obj.thisVariableWasInTheJSONAndThisIsCoolerThanUsingStringGmatchToFindEverything

jsonstring = json.encode(obj)
sendThisToWhateverNeedsIt(jsonstring)

-- Also, it is very good for very readable config files.
prettystring = json.encodePretty(obj)
saveThisToAFile(prettystring)