Hello @misticos

I have tried the basic API example provided with a test building

But it seems i can't get the API to paste the building at the Vector3 position

Pasting the building with /paste testbuilding

Works just fine

public void PasteBuilding(BasePlayer player, Vector3 pos, string filename)
{
    if(CopyPaste == null) { /*Not installed*/ return; }
    var options = new List<string> { "stability ", "false", "autoheight", "true" };
    CopyPaste.Call("TryPasteFromVector3", pos, 0f, "testbuilding", options.ToArray());
}

The "testbuilding" (its just a 3x3 twig foundations)

{
  "default": {
    "position": {
      "x": "5.901008",
      "y": "0.4499315",
      "z": "-476.8461"
    },
    "rotationdiff": "0.9581398",
    "rotationy": "108.3902"
  },
  "entities": [
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "-2.322989",
        "y": "-0.1000008",
        "z": "-1.27338"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "0",
        "y": "0.9336258",
        "z": "0"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "-1.696412",
        "y": "-0.1000008",
        "z": "2.922736"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "-1.776357E-15",
        "y": "-0.6371706",
        "z": "-1.748456E-07"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "0.7149451",
        "y": "-0.1000015",
        "z": "4.7075"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "2.622683E-07",
        "y": "0.9336258",
        "z": "-8.742277E-08"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "-4.107769",
        "y": "-0.1000004",
        "z": "1.137973"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "-8.74228E-08",
        "y": "4.075218",
        "z": "-8.742278E-08"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "2.499726",
        "y": "-0.1000013",
        "z": "2.296147"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "1.748456E-07",
        "y": "0.9336258",
        "z": "-1.748456E-07"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "4.284505",
        "y": "-0.1000009",
        "z": "-0.115207"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "8.742278E-08",
        "y": "0.9336258",
        "z": "-2.622683E-07"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "0.08836793",
        "y": "-0.1000009",
        "z": "0.5113829"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "8.742279E-08",
        "y": "0.9336258",
        "z": "-8.742278E-08"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "1.873148",
        "y": "-0.1000008",
        "z": "-1.89997"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "0",
        "y": "0.9336258",
        "z": "-1.748456E-07"
      },
      "skinid": 0
    },
    {
      "flags": {
        "Reserved2": true
      },
      "grade": 0,
      "ownerid": 76561############,
      "pos": {
        "x": "-0.5382093",
        "y": "-0.1000009",
        "z": "-3.684734"
      },
      "prefabname": "assets/prefabs/building core/foundation/foundation.prefab",
      "rot": {
        "x": "8.742278E-08",
        "y": "2.504422",
        "z": "-8.742277E-08"
      },
      "skinid": 0
    }
  ],
  "protocol": {
    "items": 2,
    "version": {
      "Major": 4,
      "Minor": 1,
      "Patch": 32
    }
  }
}

Best regards @Infinitynet