Request:

query {
  setting(name: "Max Organizations per User") {
    id
    name
    value
  }
} 

Response:

{
  "data": {
    "setting": {
      "id": "ecb31605-3045-4d14-8c12-f1f501cd31ed",
      "name": "Max Organizations per User",
      "value": "3"
    }
  }
}