Custom Tagging Domains
Map first-party domains to your GTM containers to bypass ad-blockers and Safari ITP limitations.
First-Party Context
Why use a Custom Domain for Server GTM?
By running server-side GTM on your own subdomain (e.g. gtm.yourdomain.com), cookies are recognized as 1st-party. This preserves Facebook CAPI, GA4, and Google Ads attribution from being truncated by browser privacy protections.
Active Mappings (2)
Automatic Let's Encrypt SSL providedssgtm.mystore.com Verified & SSL Active
Connected to Production GTM (US East)
Required DNS Record
CNAME • Host: ssgtm • Points to: us-east.edge-tag.stape.cloud
SSL Certificate
2027-01-15
metrics.ecommercesite.io Pending DNS Record
Connected to EU Germany GTM
Required DNS Record
CNAME • Host: metrics • Points to: eu-fra.edge-tag.stape.cloud
SSL Certificate
Pending verification