37 ways to make your tracking unbreakable.

Serve /gtm.js and /gtag/js from your own subdomain. Bypasses ad blockers + Safari ITP.

Extends cookie lifetimes in Safari (ITP) and Firefox (ETP) by re-issuing them server-side via Set-Cookie.

Coming soon. A global edge CDN for your loader files (gtm.js / gtag.js / config.js) — faster page loads, better Core Web Vitals. Not yet available to enable.

Writes a 1st-party `_tc_uid` cookie that survives ITP. Adds X-User-Id to every request for stable identification.

Enriches events with X-GEO-Country, X-GEO-Region, X-GEO-City, X-GEO-PostalCode based on visitor IP.

Adds X-Device-Mobile, X-Device-Browser, X-Device-OS headers so GTM clients can branch on device.

Adds X-User-Adblocker: true/false header so you can attribute conversions from blocked traffic.

Forwards profit-on-ad-spend signals to Meta and Google so Smart Bidding optimizes for profit, not revenue.

Identifies bot traffic via known UA patterns + JS fingerprint. Optionally blocks them before they hit your container.

Pseudonymizes IP, user_id, and PII fields before they're exported to GA4 / Meta / TikTok. GDPR-safer telemetry.

Tags requests from search-engine crawlers (Googlebot, Bingbot, …) with an X-Search-Crawler header, so SPA pages index correctly and crawler hits don't pollute your analytics.

Lets you pin a specific x-gtm-server-preview header value so webhooks and integrations can hit Preview mode.

Bind a Google service account key to your container — enables BigQuery export, Sheets writes, etc. from tags.

Coming soon. A unique static outbound IP for your container, for allow-list-based integrations. Not yet available to enable.

Reads the visitor's Google Consent Mode state server-side and forwards it to your tags as an X-Consent-State header, so they can gate firing on consent.

Auto-detects emails / phones in event payloads and replaces them with SHA-256 hashes before forwarding.

Merges anonymous + authenticated user IDs across devices and sessions for stronger Smart Bidding.

Fire HTTP webhooks on specific events. Pipe conversions to Slack, Zapier, Make, or your own backend.

Fan out a single event to 8 ad + analytics platforms — Meta, Google Ads, GA4, TikTok, Snapchat, Pinterest, Reddit and LinkedIn — server-side, one config.

Stream every event in real time to a BigQuery table you own. Power your own dashboards + ML pipelines.

Captures every paid-ad cookie (_fbp, _fbc, _gcl_aw, _gcl_dc, _ttp, _uetsid, li_fat_id, _sctr, _rdt_uuid, _pin_unauth, _x_ad_cookie) + all click IDs + UTMs into one long-lived first-party cookie. The foundation for every other attribution fix.

At checkout, copies the sticky attribution payload onto the order itself (Shopify metafield, WC order_meta, BC custom_field). Webhooks then receive attribution even when cookies don't.

When an order webhook arrives, reads the embedded attribution payload and reconstructs the browser cookies that would have been present. Restores Meta CAPI / Google Ads attribution.

Customers cross from www.brand.com → checkout.brand.com → pay.processor.com without losing _fbp / _gcl_aw / UTMs. Auto-decorates outbound links + restores attribution on landing.

Reports refunds + cancellations back to Meta CAPI / Google Ads / TikTok so ad platforms stop counting refunded purchases. Critical for accurate ROAS optimization.

Sends SHA-256-hashed customer data (email, phone, name, address) alongside every conversion to Google Ads. Recovers iOS + cross-device click-throughs Google can't see in the browser.

Real-time monitoring of CAPI Event Match Quality, deliverability, and latency for every connected ad platform. Alerts when EMQ drops below threshold or events start failing.

Coming soon. Per-account ML modeling to fill SKAdNetwork / iOS attribution gaps. Not yet available to enable.

Forwards every Stripe Subscription invoice as a separate Subscribe event tied to the ORIGINAL ad click. Lifetime value signal for Smart Bidding — the missing 80% of ad attribution.

Captures AddToCart + InitiateCheckout server-side from your platform's cart/checkout webhooks. Smart Bidding needs the full funnel — not just Purchase — to optimize correctly.

Stitches a customer's mobile-discovery journey to their desktop-purchase journey using probabilistic fingerprint matching. Closes the 30–40% of conversions that cookies can't.

Upload conversions that never touch your website — phone orders, in-store sales, CRM-closed deals — and forward them to Meta, Google Ads, TikTok and GA4 with full match keys.

Map several custom domains or subdomains to one container — run tracking for every brand or storefront you own from a single sGTM setup.

Re-injects click IDs (gclid, gbraid, wbraid, fbclid, msclkid, ttclid) and UTM params from the sticky first-party cookie when Safari or a redirect strips them from the URL.

Drop requests from IP addresses or CIDR ranges you specify before they ever reach your container — keeps internal, bot, and abusive traffic out of your data.

Serve third-party tracking scripts — fbevents.js, the Meta/TikTok/Snap pixels, analytics.js — from your own domain so URL-based ad blockers can't drop them.

Exposes an endpoint that converts XML payloads to JSON, so tags and feeds that only speak XML can be consumed by GTM Server variables.