Google Product and Service Category Codes (Up to 50)

{
  "type": "object",
  "required": [
    "search",
    "limit"
  ],
  "properties": {
    "limit": {
      "enum": [
        50
      ],
      "type": "integer",
      "default": 50,
      "description": "How many categories to return at most; only 50, the one tested, is offered."
    },
    "search": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1,
      "description": "Text to look for in category names, case-insensitive, such as a product type."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "category_code": {
            "type": "number",
            "description": "The numeric category code."
          },
          "category_name": {
            "type": "string",
            "description": "The category's name."
          },
          "category_code_parent": {
            "type": [
              "number",
              "null"
            ],
            "description": "The code of the parent category; null for a top-level category."
          }
        }
      }
    }
  },
  "description": "The matching categories, wrapped as `{results: [...]}`."
}