In the previous version(GET /contacts/v1/lists/all/contacts/all), we could get the list-membership of each contact by setting 'showListMemberships' as true.
The current V3 API does not return any values regarding list-membership when we set showListMemberships' as true. Is there any way to get the list-membership in the V3 API(GET /crm/v3/objects/contacts)?
Looks like this is a similar query that you've posted here. I have responded in that thread. Do give it a read and let me know if there's any other questions in that thread.