@raindrop Hello, have you already tried using Web Scraper Cloud which comes with an in-built proxy?
The proxy rotates the IP address of the scraper at an interval. The scraper will automatically rotate its IP address when a page containing CAPTCHA or a page containing elements that signal that the access is denied due to the scraper being blocked is encountered. Any pages marked as 'Failed' or 'Empty', will be retried at the end of the scraping job using a different IP address.
Also, if a scraping job finishes with failed/empty pages, selecting "Continue" for this job in the jobs list will cause the scraper to attempt to retry such pages.
Learn more: General questions regarding proxy usage