I think the updated version Answer to this question is:

"the API does not explicitly provide a separate "Added/Excluded" column, so you'll need to analyze the data to determine the status based on whether the search term is present in your negative keyword list."

so you have to pull the search term and compared to see if it is already in the adgroup, adgroup negative keyword, campaign negative keyword and or 'Shared Library' 'Exclusion lists'