response_type

How the screenshot should be returned:

• image (default): Returns the raw image binary data with appropriate Content-Type header
• file: Same as image, returns raw binary data
• json: Returns a JSON object with the image URL, image dimensions, and the raw HTML content of the page
• url: Same as json, returns {"url": "...", "width": 1280, "height": 800, "mime": "image/png", "html": "..."}
• redirect: Performs an HTTP redirect to the image URL