Hi Sam,
I'm sorry, but the SIM API is meant for a different use case, where inputs are short text fragments where usually you have one or more entities mentioned in it (Eg. tweets, short blog posts, product reviews, headline news, title of a web page, etc...)
However, we have already built several language models that we use internally and that could solve your use case, but we haven't yet created any API for it. We will evaluate this possibility in the near future, but if you want a quote for having it shortly, don't hesitate to contact us.
Any feedback is always really appreciated!
Ciao,
-- Ugo