deadlinkchecker

What is deadlinkchecker?

About

deadlinkchecker is a web crawler service operated by DLC Websites that crawls customer websites to identify and report broken links (404, 500 errors, etc.). It helps website owners maintain site quality and SEO rankings by detecting problematic links. You can see how often deadlinkchecker visits your website by setting up Dark Visitors Agent Analytics.

Agent Type

Expected Behavior

Developer helpers are tools that monitor, test, or analyze websites on behalf of developers and site operators. They perform tasks like uptime monitoring, performance testing, and accessibility checks. Traffic patterns vary widely. Some tools make regular scheduled checks (such as uptime monitors pinging every few minutes), while others perform one-time scans triggered by a human. These helpers typically access specific pages or endpoints rather than crawling entire sites, though comprehensive audit tools may scan multiple pages.

Detail

Insights

The percentage of all internet traffic coming from Developer Helpers

Robots.txt

Should I Block deadlinkchecker?

Probably not. Developer helpers are normally used to optimize or find problems with your website.

How Do I Block deadlinkchecker?

You can block deadlinkchecker or limit its access by setting user agent token rules in your website's robots.txt. Set up Dark Visitors Agent Analytics to check whether it's actually following them.

# In your robots.txt ...

User-agent: deadlinkchecker # https://darkvisitors.com/agents/deadlinkchecker
Disallow: /

⚠️ Manual Robots.txt Editing Is Not Scalable

New agents are created every day. We recommend setting up Dark Visitors Automatic Robots.txt if you want to block all agents of this type.

References

• https://deadlinkchecker.com/