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What is Prism?
Prism is Adsidian's server-side, first-party conversion tracking system. It captures visitor activity and conversions on your website and delivers them directly to ad platforms (Meta Conversions API, Google Ads) from the server — recovering the 20–40% of conversions that browser pixels lose to ad blockers, Safari's tracking prevention, and iOS privacy changes.
How it works
- A first-party tracking subdomain. You point
track.yourdomain.comat Prism with a single CNAME record. Because the tracking endpoint lives on your domain, browsers treat it as first-party — no third-party cookie restrictions apply. - A lightweight snippet (~3 KB) loads from that subdomain and captures page views, ad click IDs (
fbclid,gclid, and others), UTMs, and any custom events you define. - A server-set identity cookie. Prism issues an HTTP-only cookie (
adsidian_id) that persists for one year — immune to Safari's 7-day cap on JavaScript cookies — so conversions that happen days or weeks after the ad click still get attributed. - Server-side delivery. Events are forwarded to Meta CAPI and Google Ads from Prism's servers with full match data, deduplicated, and reconciled daily against what the platforms report receiving.
What you need
| Step | Who does it | Time |
|---|---|---|
| Add one CNAME record | Whoever manages your DNS | 2 min |
| Install the snippet | Whoever manages your website | 5 min |
| Connect Meta / Google Ads | Your agency, in the Adsidian dashboard | 5–10 min |
Start with the Quickstart.