404 tracking
Seean reports not-found pages when the document is marked as a 404.
Mark the page
Add this meta tag to the <head> of your not-found page or template, before the tracker script:
<meta name="seean:status" content="404">
The tracker reads the marker when it sends the page’s own pageview and adds status: 404 to it, so the page counts exactly once. The record uses the current path and appears under Overview → Pages → 404s. Nothing else needs to run on the page.
For a single-page application, render the marker before the route change reaches the tracker (before pushState, or in the served HTML of the not-found route). The tracker checks the marker on every pageview it sends.
Older marker call
window.seean.track("pageview", { status: 404 }) still sends a marked pageview, but it is a second pageview next to the automatic one and inflates views and usage. Replace it with the meta tag.
What this does not detect
Seean does not crawl your site for broken links or inspect every HTTP response. If a failed page never loads the tracker or never sends the marker, it will not appear in the 404 report.
Use the activity log to inspect recorded paths and the export when you need the underlying rows.
Something unclear? Contact support.