Finding position and skill association via API

Hi,

I am trying to verify that all positions or shifts have a particular set of skills associated with them.

Initially I used the endpoint: https://www.humanity.com/api/v2/shifts?mode=overview&start_date=2019-01-01&end_date=2019-03-20&filter_by_skill=82456,82457&access_token=

But the results fetched here do not match or get confirmation with our team working on Humanity UI and they show me the skill association page as per following snapshot.

Is there any endpoint or some way to see which positions have what skill associated with them or something like this.

Thanks in Advance.