Published on 2025-08-07T06:18:08Z

SiteCheckerBotCrawler

SiteCheckerBotCrawler is the web crawler for the SEO tool SiteChecker.pro. It is a technical audit bot that is activated only when a user initiates a scan of a website. Its purpose is to analyze a site for technical SEO issues, performance metrics, and content quality to provide the site owner with actionable insights for improvement. Its presence in your logs means someone is actively analyzing your site's SEO health.

What is SiteCheckerBotCrawler?

SiteCheckerBotCrawler is the web crawler for the website auditing and SEO analysis tool SiteChecker.pro. It is a specialized bot designed to analyze websites for technical SEO issues, performance, and content quality. The bot identifies itself in server logs with the user-agent string SiteCheckerBotCrawler. It works by systematically visiting the pages on a target site to collect data on factors like HTML structure, page speed, and other elements that impact search engine rankings.

Why is SiteCheckerBotCrawler crawling my site?

SiteCheckerBotCrawler is crawling your website because someone has used the SiteChecker.pro tool to analyze it. This could be you, a member of your team, or a third party such as a competitor or marketing consultant. The crawler is not a continuous one like a search engine's; it performs targeted crawls only when a user initiates an analysis on the SiteChecker.pro platform. The scope of the crawl is determined by the settings the user selects for the audit.

What is the purpose of SiteCheckerBotCrawler?

The purpose of SiteCheckerBotCrawler is to gather the technical and SEO-related data that powers the SiteChecker.pro analysis tools. These tools help website owners and marketers identify and fix issues that could be affecting their search rankings or user experience. The bot collects information on technical SEO factors, content quality, and broken links. The platform then processes this data into reports with actionable recommendations for improving the website's performance. For the person who initiates the scan, the service provides valuable diagnostic information.

How do I block SiteCheckerBotCrawler?

To prevent users of the SiteChecker.pro tool from analyzing your website, you can add a disallow rule to your robots.txt file. This is the standard method for managing crawler access.

To block this bot, add the following lines to your robots.txt file:

User-agent: SiteCheckerBotCrawler
Disallow: /

How to verify the authenticity of the user-agent operated by SiteChecker.pro?

Reverse IP lookup technique

To verify user-agent authenticity, you can use host linux command two times with the IP address of the requester.
  1. > host IPAddressOfRequest
    This command returns the reverse lookup hostname (e.g., 4.4.8.8.in-addr.arpa.). 
  2. > host ReverseDNSFromTheOutputOfFirstRequest
If the output matches the original IP address and the domain is associated with a trusted operator (e.g., SiteChecker.pro), the user-agent can be considered legitimate.

IP list lookup technique

Some operators provide a public list of IP addresses used by their crawlers. This list can be cross-referenced to verify a user-agent's authenticity. However, both operators and website owners may find it challenging to maintain an up-to-date list, so use this method with caution and in conjunction with other verification techniques.