I posted the following to the All Things API thread but never got a response so I'm trying here. Hope this is the right place!
In the fall of 2015 I was trying to develop my own speedgrader for open response quiz questions when I discovered that the quiz API was not working as documented. This long process is covered in this thread that included Jason Sparks, James Jones and some key help from WIlliam Frakes.
In the end Jason Sparks said:
This is a very innovative use of the API. The current API remains in a stage as we are actively
17 months later I thought I would check back and see if any progress has been made. However, the documentation does NOT seem to have been updated - so the broken API calls and misleading examples (see my explanation) are still there.
Nevertheless, hope springs eternal and I wanted to see if someone from Instructure could provide an update.
Brookline High School