Meta Conversions API explained: why your pixel isn’t enough
Why browser-only Meta Pixel tracking under-reports sales, how the Conversions API fixes it, and how to set it up with deduplication.
Why browser-only Meta Pixel tracking under-reports sales, how the Conversions API fixes it, and how to set it up with deduplication.
Why pixels miss conversions
Ad blockers, browser tracking prevention and consent refusals stop some pixel events firing. Meta then sees fewer conversions, and its algorithms optimise on incomplete data.
RELATED GUIDEGA4 ecommerce events: the complete setup guide →How CAPI helps
The Conversions API sends events from your server to Meta. Combined with the pixel, it fills gaps and sends richer customer information (hashed) for better matching.
Is your tracking accurate?We set up GA4, GTM, consent and ad conversions properly.Get a free tracking audit →Setup options
- Platform integrations (Shopify, WooCommerce plugins)
- Server-side Google Tag Manager
- Conversions API Gateway
- Direct API integration for custom sites
Check your setup
In Events Manager, check event match quality, deduplication and that purchase values and currency are correct.
Common mistakes to avoid
How we help with analytics
Frequently asked questions
Do I still need the pixel?
Yes — use both, deduplicated.
Is CAPI GDPR-compliant?
It must respect user consent; only send events where consent allows.
Does CAPI improve ROAS?
Better data usually improves optimisation and reported ROAS.