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Enable low-level diagnostics with TCP Dumps/PCAPs for checks

Feature Request

Add the ability to capture and analyze raw network packets (TCP dumps or PCAPs) for API and TCP checks, providing detailed insights for troubleshooting and debugging.

For example, this can help surface underlying issues like DNS retries or misconfigured headers.

Posted by Susanne Tünker ·
Status: In Progress2 comments

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Comments2

  • Susanne Tünker

    •

    Oct 27, 2025

    TCP dumps & traceroutes are now supported in API checks:

    https://feedback.checklyhq.com/changelog/whats-new-in-october

    If you’d like to see them in TCP monitors (or other check types), please let us know in the comments section below 🙂

    • alexandre.buisine@enix.fr

      •

      Apr 13

      Hi, we got a clear interest in having traceroute while url or icmp (or tcp) monitors fails.
      Using API check would mean increased costs as well as destroying any interest in simple checks.