User ID

User ID power-up adds a stable hashed user identifier to requests processed by your sGTM container. This helps server-side tracking recognize returning visitors more consistently when cookies are limited. You can also enable Cross-domain ID to identify the same visitor across multiple domains.

User ID is available to all Stape users. You can find it in the Power-ups tab in your Stape account.

Open your Stape account → Choose your recent sGTM container → Click Power-ups → Find User ID and click Use.

User ID creates a hashed identifier from signals in the incoming request, such as user IP, user-agent string, hostname, and TLS settings. Stape adds this value to each request processed by your sGTM container as the X-Stape-User-Id request header.

Since hostname is part of the hash, the same visitor gets a different X-Stape-User-Id on each domain. If your user journey spans several domains, you can enable the Cross-domain ID option. It adds an additional X-Stape-Cross-Domain-Id header, generated from the same signals except hostname, so the same visitor gets one ID across all domains that send requests to your sGTM container.

After you create a Request Header variable in sGTM for X-Stape-User-Id (and X-Stape-Cross-Domain-Id, if enabled), your tags and variables can use this ID where your tracking setup needs a user identifier. 

• Recognize returning visitors more consistently. User ID adds a hashed identifier to incoming requests, helping your tracking connect related events when browser cookies are limited.
• Send more connected data to your tracking tools. Add the User ID to supported tags and variables, so analytics and ad platforms can work with the same visitor identifier across related events.
• Keep Cookie Keeper working when other identifiers are unavailable. Configure Cookie Keeper based on Stape User ID and use it as the master cookie when you cannot set up a consistent master cookie.
• Connect visitor activity across your domains. Enable the Cross-domain ID option to recognize the same visitor on all your domains, for example, when they move from your main website to a checkout on a separate domain.

Use User ID to add a hashed identifier to incoming sGTM requests and connect related visitor activity more consistently when cookies are limited.

• How to set up User ID power-up
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• How to anonymize user data in Google Analytics 4