LinkCheck

Generally no. LinkCheck by Siteimprove helps monitor and improve search performance across the web. If you use SEO tools yourself, blocking it undermines the ecosystem. However, you might limit LinkCheck by Siteimprove's access if it consumes excessive server resources or crawls too aggressively.

If you want to, you can block or limit LinkCheck by Siteimprove's access by configuring user agent token rules in your robots.txt file. The best way to do this is using Automatic Robots.txt, which update automatically as new agents are discovered. While the vast majority of agents operated by reputable companies honor these robots.txt directives, bad actors may choose to ignore them entirely. In that case, you'll need to implement alternative blocking methods such as firewall rules or server-level restrictions. You can verify whether LinkCheck by Siteimprove is respecting your rules by setting up Agent Analytics to monitor its visits to your website.

Blocking SEO crawlers has minimal direct impact on your search rankings since they're not the ones who do the actual search indexing. However, these tools help the SEO ecosystem function by providing competitive analysis and optimization insights. Widespread blocking could reduce overall SEO tool effectiveness.

SEO crawlers typically analyze publicly accessible content to gather optimization insights. They generally don't attempt to access private or authenticated content, focusing instead on pages that are publicly indexable. However, some advanced SEO tools may analyze login pages, error pages, or other publicly accessible but sensitive areas to assess site security and structure.

Setting up Agent Analytics will give you realtime visibility into LinkCheck by Siteimprove visiting your website, along with hundreds of other AI agents, crawlers, and scrapers. This will also let you measure human traffic to your website coming from AI search and chat LLM platforms like ChatGPT, Perplexity, and Gemini.

LinkCheck by Siteimprove likely found your site through public web discovery, competitor analysis, or because your domain appears in backlink databases, ranking reports, or other SEO intelligence sources. Your site may be monitored by their customers or identified as relevant for competitive analysis.

Agent Analytics authenticates agent visits from many agents, letting you know whether each one was actually from that agent, or spoofed by a bad actor. This helps you identify suspicious traffic patterns and make informed decisions about blocking or allowing specific user agents.