query Meter($id: ID!) {
  meter(id: $id) {
    id
    object
    name
    status
    livemode
    created
    updated
    key
    source {
      event
      reported
    }
    aggregation
    value_path
    unit
  }
}

{
  "id": "mtr_1a2B3c"
}

{
  "data": {
    "meter": {
      "id": "mtr_1a2B3c",
      "object": "meter",
      "name": "Example",
      "status": "active",
      "livemode": true,
      "created": 1791302400,
      "updated": 1791302400,
      "key": "signature",
      "source": {
        "event": "example",
        "reported": true
      },
      "aggregation": "count",
      "value_path": "example",
      "unit": "kg"
    }
  }
}