Know exactly which GTM tags are breaking - and why
TagSense connects directly to Google Tag Manager via the Management API and applies per-tag monitoring metadata. Every tag fire becomes a trackable event with exact fail rate, error message, and page breakdown.
What GTM tag monitoring gives you
Per-tag fail rates
See exactly which tags fail and how often. Not just "something is wrong" - the exact tag, exact fail rate, updated in real time.
Browser error logs
TagSense captures the actual JavaScript error message from the browser. Go from unknown failure to specific fix in minutes, not days.
Page-level breakdown
See which pages a tag fires on, which pages have the highest fail rate, and where in the funnel the problem occurs.
Trigger attribution
For GTM users, every tag fire is linked to the specific trigger that caused it - so you can diagnose misfires and duplicate fires.
Daily trend charts
Track whether fail rates are improving or getting worse. Spot when a deployment broke a tag by correlating trend spikes with release dates.
Ad blocker detection
See which tags are being blocked by ad blockers and privacy extensions - a common blind spot in standard GTM reporting.
Real story: Analytics engineer finds GA4 error in 8 minutes
An analytics engineer sees the GA4 tag has a 12% fail rate in the TagSense Tag Health dashboard. They click the tag row and see the error log: "TypeError: gtag is not a function" - occurring on 3 specific pages.
Those pages were recently migrated to a new CMS template that didn't carry over the gtag base code. The engineer identifies the root cause in 8 minutes and issues a fix. Without TagSense, this would have been a week of back-and-forth debugging.
Start monitoring your GTM tags today
Free plan - 3 tags, 1 site. First data in under 5 minutes. Works in 3 steps: sign up, install via GTM, see your tags.