API: Find all Items discovered by discovery rule in a template.

[Pato]

I am struggling with this one

I have Item Prototypes inside a Discovery Rule inside a Template.
Another template is linked, and that template has linked hosts.

All these hosts get discovered items, and all works great.

Now I want to list all these discovered items with the API.
How I can list them?

With this I get close
{
"jsonrpc": "2.0",
"method": "item.get",
"params": {
"search": {
"key_": "MY KEY"
}
},
"auth": "token",
"id": 1
}

But of course, it lists other things that where not discovered by this template, and there is no way to filter that list.
Unfortunatelly I cannot see any type of "Discovered By" where I could put the ID of my Discovery Rules.

Any ideas?

[Pato]

I found a way and learned a few things along the way

1. Search on Integers is not implemented nor documented as such...?!?! A workaround it to use a filter object
2. searchWildcardsEnabled is broken/inconsistent it works only under certain conditions

{
   "jsonrpc": "2.0",
   "method": "item.get",
   "params": {
      "output": ["itemid", "selectItemDiscovery"],
      "filter": {
            "status": 1
      },
      "search": {
            "key_": "free.space"
      },
      "searchWildcardsEnabled": false,
      "selectItemDiscovery": ["key_"]
   },
   "auth": "secret",
   "id": 1
}

This is good enough but not perfect.
With selectItemDiscovery, I can pipe it into an external script. Ideally it should be done entirely by the JSON request.
But I could not find a way to filter/search or do a sub filter/search, and I am not the first one:
https://www.zabbix.com/forum/zabbix-...-on-query-data

Anybody a clue?