# Campaign #18: Server-Side CAPI & Deduplicated Event Streams (Multi-Channel Data Engine)

## Platform & Benchmark Profile
- **Platform:** Signal Infrastructure (Tracking)
- **Audited Spend Benchmark:** $1,450,000
- **Delivered Traffic:** 18.5M Events
- **Average Cost:** Match Score 8.8/10
- **Production Results:** +31% Attributed Conversions
- **Key Efficiency Metric:** Clean Deduplication

## The Operational Failure Mode
Browser pixels missed 41% of conversions due to iOS privacy shields. Server-side CAPI with deterministic event_id deduplication restored 31% more attributed conversions to algorithms.

## The Code-First Execution Fix
Dual-tag browser + Cloudflare Worker CAPI proxy, sha256 normalized user hashing, deterministic event_id parity.

## Deploy & Run
- 1-Click Interactive Runbook: https://synterai.com/campaigns/share/runbook-server-side-capi
- Complete Technical Breakdown: https://synterai.com/blog/server-side-capi-multi-channel-tracking-guide
- Open Source Terminal MCP: https://synter.dev