Are you following Airwave API guide which we get in Home > Documentation page in Airwave?
---We see parent_id in folder_list.xml API output. Default we have Top folder in Airwave, if we create a sub folder under Top then parent_id of sub folder will be the TOP''s folder id.
Default folder_id for Top folder is 1, we can see this details in URL of Devices > List.
https://10.23.194.xx/ap_list?ap_folder_id=1
---group_id we see in ap_list.xml and BSSID API outputs and it the actual id which we see in URL of Group > Monitor page of Airwave group.
https://10.23.194.xx/ap_group_monitoring?id=183
amp:amp_ap_list version="1" xsi:schemaLocation="http://www.airwave.com amp_ap_list.xsd">
<ap id="2833">
<controller_id>2814</controller_id>
<device_category>thin_ap</device_category>
<firmware>8.3.0.6-8.3.0.6_69128</firmware>
<folder id="254">EPSBG-SEV-001</folder>
<group id="183">WIFI_CORP</group>
<is_remote_ap>false</is_remote_ap>
<is_up>false</is_up>