discourse/spec/requests/api/schemas/json/group_create_request.json

{
  "additionalProperties": false,
  "properties": {
    "group": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string"
        }
      },
      "required": [
        "name"
      ]
    }
  },
  "required": [
    "group"
  ]
}