I don't think there is an object restrictions for the free version, its just limited in features.

Hi all, am trying to find the right category to query the API and get the person object with its assigned groups, but I am not getting them. I've tried many categories, but I can't find the right one, so far this is my base query:

{
    "version": "2.0",
    "method": "cmdb.objects.read",
    "params": {
        "categories": [
            "C__CATS__ORGANIZATION_PERSONS","C__CATG__ASSIGNED_SUBSCRIPTIONS", "C__CATS__PERSON_ASSIGNED_GROUPS"
        ],
        "filter": {
            "type": "C__OBJTYPE__PERSON",
            "title": "John Doe"
        },

        "order_by": "",
        "sort": "",
        "apikey": "xxxxxxx"
    },
    "id": 1
}

Any hints on where is my error?