And here are the corrected categories 😆
{ "method": "cmdb.object.create", "params": { "categories": { "C__CATS__PERSON_LOGIN": [ { "disable_login": 1, "username": "logonname" } ], "C__CATS__PERSON_MASTER": [ { "assigned_organization": 31, "phone_company": "+049 3641 111 111", "mail_address": "firstname.lastname@domain.com", "last_name": "lastname", "first_name": "firstname" } ] }, "title": "firstname lastname", "apikey": "apikey", "type": "C__OBJTYPE__PERSON" }, "id": 343653293, "jsonrpc": "2.0" }You can find the Constants here -> https://kb.i-doit.com/en/i-doit-pro-add-ons/api/index.html#attribute-documentation