get https://darwin.v7labs.com/api/datasets//item_counts
All of the sames fields as in the Generate Export filter object can be used as query parameters. See https://docs.v7labs.com/reference/exports#generate-export. Arrays of Ids become comma separated lists. See the code example; which uses a sub-set of the available query parameters.
Deprecation
This endpoint will be deprecated in the future. Keep an eye out for this documentation page as the replacements will be listed here.