Google Spell API and TinyMCE

问题:

I just successfully implemented the spell checking plugin for TinyMCE using the instructions here. I got a bit scared, though, by this ending paragraph.

I've had some trouble finding good documentation of the Google Spell Service and it seems as if it is no longer updated but still available to developers already using it (which should include the TinyMCE .Net package even though you haven't used it before). However, use at your own risk should Google decide to delete it. This is the only official documentation I can find and that isn't much...

Am I to understand this to mean that the spell checking service used by Moxiecode.TinyMCE.dll points to an unsupported, abandoned api from Google?

EDIT

It seems as though the spell checking is happening via a post to https://www.google.com/tbproxy/spell?... as decribed here.

Is this service documented anywhere?