API access to attachments

I'm using version 7.1.5 and needing to access attachments via the API.

Is there a way to do this?

Basically, I'm looking at doing some unattended/automated testing driven from Test Sessions.

I've created a number of Test Cases and attached to each one a script to drive that particular test.

I've added the Test Cases to a Test Session

The testing application will identify each Test Session to run and loop through each of the attached Test Cases running its script and then updating the status depending on the result (and with a bit of luck logging a Ticket).

But... I can't find an endpoint which lets me access the actual attached document. The attachment endpoint gives me the metadata associated with the document and a path on the web server to the file which doesn't really help me.

Is there a way to get the actual document via the API?