Marketing & Paid AdvertisingCAPI

Conversions API

Meta's server-side tracking solution that sends conversion data directly from your server.

1 min readLast updated Apr 2026

Meta's server-side tracking solution that sends conversion data directly from your server.

Why It Matters

CAPI sends conversion data server-to-server, bypassing browser limitations that block Pixel tracking. With iOS14.5 and browser privacy features, CAPI has become essential—brands using CAPI see 15-30% more attributed conversions and significantly better campaign optimization. It's no longer optional for serious advertisers.

Practical Example

Scenario

A skincare brand sees Meta reporting 200 purchases, but Shopify shows 280. After implementing CAPI, Meta visibility jumps to 265 purchases.

Result

With 33% more conversion data, their campaign optimization improves dramatically. CPA drops 18% because Meta can now see which audiences actually convert.

Pro Tips

  • 1Use Shopify's native CAPI integration—it's one-click and properly configured for deduplication
  • 2Send the same event_id for Pixel and CAPI events to prevent double-counting
  • 3Include customer_information parameters (email, phone) for better matching—aim for Event Match Quality of 7+
  • 4Monitor Event Match Quality in Events Manager—low EMQ means your user data isn't matching Facebook profiles

Common Mistakes to Avoid

Implementing CAPI but not deduplicating with Pixel events, leading to inflated conversion counts
Not hashing customer data properly—Meta requires SHA-256 hashing for PII, and improper hashing kills match rates
Setting up CAPI without testing—always verify events in Events Manager Test Events tool

Frequently Asked Questions

Related Terms

Meta Pixel

JavaScript code installed on your website that tracks visitor actions and conversions.

Server-Side Tracking

A tracking method where data is collected on your server rather than the user's browser.