Server-Side GTM Checker – Find sGTM Custom Domains

Check whether a website is using server-side Google Tag Manager and discover its publicly accessible sGTM custom domain.

Enter a website URL or domain below. The scanner will examine publicly available signals and display the detected server-side tagging URL, provider, status, and confidence level.

What Does the sGTM Checker Find?

Our server-side GTM checker helps identify:

  • The website submitted for analysis
  • Whether a server-side GTM endpoint was detected
  • The possible sGTM custom domain
  • The server-side tracking endpoint URL
  • The associated hosting provider, when available
  • The confidence level of the detection

What Is a Server-Side GTM Custom Domain?

A server-side Google Tag Manager custom domain is a first-party domain or subdomain used to send analytics and advertising requests through a GTM server container.

Common examples may include:

  • sgtm.example.com
  • tracking.example.com
  • metrics.example.com
  • collect.example.com

Using a custom server-side tracking domain can provide greater control over how measurement data is collected and forwarded to platforms such as Google Analytics 4 and Google Ads.

Why Use a Server-Side Tracking Checker?

You can use this tool to:

  • Check whether a website appears to use server-side GTM
  • Find a possible GTM server container URL
  • Verify an existing sGTM custom domain
  • Audit a website’s public tracking setup
  • Troubleshoot server-side tagging configurations
  • Identify first-party measurement endpoints

How Does the Server-Side GTM Checker Work?

The scanner reviews publicly observable website requests and related domain information. It looks for evidence associated with server-side Google Tag Manager, first-party tracking endpoints, DNS records, certificate data, and supported health responses.

The scan does not require access to the website’s Google Tag Manager account or private analytics data.

Understanding Your Results

Server-Side URL Detected

Strong public evidence of a server-side tracking endpoint was found. A successful /healthy response containing ok is treated as confirmed detection.

Possible Server-Side URL

A potential sGTM domain was identified, but the available public evidence is not strong enough to confirm it automatically.

Not Detected

No observable server-side GTM endpoint was found during the scan. This does not necessarily prove that server-side tracking is absent because consent settings, bot protection, geographic restrictions, or backend-only requests may hide it.

How can I find a website’s sGTM URL?

Enter the website address into the server-side GTM domain checker. The tool will inspect publicly available signals and return any potential or confirmed endpoint.

Can this tool detect every server-side GTM setup?

No public scanner can detect every configuration. Some server-side requests only occur after consent, user interaction, login, checkout, or specific geographic conditions.

What does the confidence level mean?

The confidence level represents the strength of the publicly observable evidence. It is an evidence-based score and not a statistical guarantee.

Does the scanner access private website data?

No. It only evaluates publicly available website requests and domain information.

Check a Website for Server-Side GTM

Enter a domain above to discover whether the website appears to use a server-side Google Tag Manager custom domain.