This is a humble user speaking.
Suppose I want to run a query over the rest api that gives me a list of tickets that had interactions over the last month. What query can I use?
I can use that result to get to the tickets and ticket_articles and merge it into a nice invoice.
Big chunks I have already done for other applications.
If you like I can publish the final product.
p.s. did I already mention what a great product Zammad is?