Accessing previous chat messages via the API?

Hi, simple question. Is it possible to access past chat messages with the API? I know how to listen for chat events live, but I'm curious if the API can look into the past either by accessing some attribute (the DOM, etc) or if i can somehow "replay" the event stream in a loop. Thanks! If you're curious WHY I want to do this: I've previously made a parser that can read the HTML chat logs and compute the average rolls, but the HTML is quite a large file (4MB+) and includes a lot of unnecessary text, it would save a lot of space if I could crunch the numbers on the JS side. I doubt it, but I figured I'd double check this avenue before getting into HTML space saving shenanigans

Will the RollStats script work for you? EDIT - optionally, you may be able to modify Oosh's UnWhisper script to capture all chat entries, though I don't know at what point it becomes untenable.  

Mod scripts don't have access to any chat messages except the ones that occur while it is running.  You'd have to take statistics from chat messages going forward, but you could store all your counts in the state object so you could persist the gathering across executions of the script.