Google Shopping Products for a Query (Rating Sort, 20 Results)

{
  "type": "object",
  "required": [
    "q",
    "num",
    "sort_by"
  ],
  "properties": {
    "q": {
      "type": "string",
      "maxLength": 2048,
      "minLength": 1,
      "description": "The product to search for, in plain text."
    },
    "num": {
      "enum": [
        20
      ],
      "type": "integer",
      "default": 20,
      "description": "Number of products to return. Fixed at 20."
    },
    "start": {
      "enum": [
        0
      ],
      "type": "integer",
      "default": 0,
      "description": "Result offset; only 0, the first results, is offered."
    },
    "sort_by": {
      "enum": [
        "3"
      ],
      "type": "string",
      "default": "3",
      "description": "Sort order: \"3\", rating high to low. The only value offered."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "shopping_results": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "price": {
            "type": "string",
            "description": "The price as shown, with its currency sign."
          },
          "title": {
            "type": "string",
            "description": "The product title."
          },
          "rating": {
            "type": "number",
            "description": "The product's star rating out of 5."
          },
          "source": {
            "type": "string",
            "description": "The store or seller offering the product, as Google shows it."
          },
          "reviews": {
            "type": "number",
            "description": "The product's review count."
          },
          "delivery": {
            "type": "string",
            "description": "The delivery terms as Google shows them, where shown."
          },
          "position": {
            "type": "number"
          },
          "old_price": {
            "type": "string",
            "description": "The earlier or usual price as shown, where Google shows one."
          },
          "extensions": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "Short labels such as a discount or a returns window."
          },
          "product_id": {
            "type": "string",
            "description": "Google's product ID."
          },
          "extracted_price": {
            "type": "number",
            "description": "The price as a number."
          },
          "extracted_old_price": {
            "type": "number",
            "description": "The earlier price as a number, where one is shown."
          }
        }
      },
      "description": "Up to 20 product listings, in Google's order for the rating sort."
    }
  },
  "description": "The product listings."
}