Hi, I was recently tasked by my company to develop or find a solution that can convert CAD drawing at backend without user interaction to PDF files. I learned that DraftSight Professional provides api for automation. But I tried very hard on the product website and could not find API documentation, except a few very high level marketing materials.

Can someone point me to the right place? Or do I need to buy a license first to get access to the documentation? 

Many thanks in advance.