Document Generation API License cost for on-prem java sdk

Hi,

We are looking for a PDF generation solution to create PDF or update the existing PDFs based on the information provided. We are evaluating Document Generation API for the same. Is Document Generation API cloud based or on-prem standalone version (using Java SDK) is also available?

Also, is Document Generation API licensed under AEM 6.5 or we need to buy a separate license for it for our enterprize application? Or is it free?

If not, what is the license cost?

@Ben Vanderberg 

Regards,

Umair.