Listing all materiasl used on a job

Hi, I am trying to list all the materials used on a job via and API request. I have been looking at: https://developer.servicem8.com/reference/get-jobmaterial-all however that lists all available materials regardless of job.

I have not had any success even getting a known material using the suggested method here: https://developer.servicem8.com/reference/get-jobmaterial-single

I want to know all the materials used on each job so that I can automatically update my inventory software.

Can someone please point me in the right direction?

thanks very much!