Use the extractRules parameter to extract specific content from the page using CSS selectors. This is useful when you want structured JSON output without parsing raw HTML manually. The value is a simple object where each key is the name of the field you want, and the value is the CSS selector used to extract it.
Use extractRules when you need fast, lightweight structured data without running a full AI model.

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Format

{
  "fieldName": "css selector"
}
Each selector will return the text content of the matched element.

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Example: Extract Page Title

{
  "title": "h1"
}
This extracts the text of the first <h1> on the page and returns it under the title key.

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Example: Extract Multiple Fields

{
  "title": "h1",
  "price": ".product-price",
  "description": ".product-description"
}
This returns: 
{
  "title": "Apple iPhone 14",
  "price": "$799",
  "description": "The latest iPhone with A15 Bionic chip..."
}

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Attribute Extraction

You can extract an attribute by using @attribute syntax: 
{
  "image": "img.product-main @src",
  "link": "a.buy-button @href"
}

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Notes

  • Only the first match per selector is returned
  • If the selector is not found, the value will be null