import requests

url = "https://{FUSION_HOST.com}/api/templating/settings/_schema"

response = requests.get(url)

print(response.text)

{
  "type": "object",
  "title": "General settings of the template service.",
  "description": "Stores common application configuration of templating service.",
  "properties": {
    "id": {
      "type": "<string>",
      "title": "<string>",
      "description": "<string>"
    },
    "app": {
      "type": "<string>",
      "title": "<string>",
      "description": "<string>"
    },
    "hierarchyFields": {
      "type": "array",
      "title": "Hierarchy fields",
      "description": "<string>",
      "items": {
        "type": "object",
        "properties": {
          "field": {
            "type": "<string>",
            "title": "<string>",
            "description": "<string>"
          }
        },
        "separator": {
          "type": "<string>",
          "title": "<string>",
          "description": "<string>"
        }
      }
    }
  },
  "category": "<string>",
  "categoryPriority": "<string>",
  "unsafe": true
}