ATTRIBUTION·JUL 17·16 MIN
Debugging event ID collisions in production Meta CAPI
A postmortem on event ID deduplication debugging. Three collision shapes, the BigQuery SQL to surface them, and the fix that pinned the generator.
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Topical cluster
Attribution & CAPI
Everything about getting Meta, Google, and Klaviyo to agree on what a conversion is. Pixel to CAPI migrations, event_id dedup patterns, consent-mode gotchas, and the forensic work of finding the 30% of conversions your reports are missing. Each piece is grounded in a real DTC rebuild.
23 postsFor: DTC operators $2-10M who suspect their tracking is lying to them
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ATTRIBUTION·JUL 1·16 MIN
Meta CAPI match quality scoring: how to audit your setup
A field operator's audit pattern for Meta CAPI match quality scoring. Read Events Manager, decode the per-identifier score, and find what is leaking spend.
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ATTRIBUTION·APR 17·9 MIN
Reconciling GA4, Meta, and Shopify purchase counts
The short, full, and nuanced answer on ga4 meta shopify reconciliation. Five sources of variance and the one number to trust per question asked.
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ATTRIBUTION·APR 11·11 MIN
Meta CAPI Double-Counting: Why It Happens and How to Fix It
CAPI without proper event deduplication doesn't just miss conversions - it invents them. Here's how the double-counting works and how to stop it.
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ATTRIBUTION·APR 9·12 MIN
The 14 checks I run on any DTC Shopify store in 30 minutes
Every Shopify attribution audit I run starts with these 14 checks. Here is the exact list, what I'm looking for, and what a failure actually costs.
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ATTRIBUTION·APR 2·2 MIN
Why your Meta CAPI is probably broken
The six most common misconfigurations I find when auditing server-side tracking for DTC brands. Plus the fixes.
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ATTRIBUTION·APR 1·13 MIN
What to check in a CAPI implementation before shipping
A 14-point pre-launch checklist for Meta Conversions API. Covers dedup, match quality, Shopify checkout events, consent mode, and revenue reconciliation.
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ATTRIBUTION·MAR 18·13 MIN
Hashing PII for CAPI purchase events without leaks
A tutorial on capi purchase event pii hashing. The six-step pipeline that normalizes, hashes, and keeps raw values out of every log sink in production.
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ATTRIBUTION·MAR 16·9 MIN
Debugging CAPI payload mismatches in production
A postmortem on capi payload mismatch debugging. Three root causes, the verification sequence, and the fix that held in production at a Shopify DTC.
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ATTRIBUTION·MAR 14·10 MIN
Why DTC brands should run lift tests over last-click
A contrarian case on lift test vs last click dtc attribution. Why last-click misreads incrementality and how a cheap geo lift gives the real answer.
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ATTRIBUTION·MAR 11·12 MIN
The Meta attribution audit that found 31% more conversions
A reconstructed Q&A with a DTC operator who ran a Meta attribution audit and recovered 31% of conversions their Pixel never reported. What we found, and why.
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ATTRIBUTION·MAR 6·15 MIN
Consent Mode v2 and CAPI - what actually fires on your server
A pattern-library breakdown of consent mode v2 capi behavior across four consent states, with the DTC failure modes each one produces on Meta attribution.
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ATTRIBUTION·FEB 27·11 MIN
CAPI for subscription commerce without double counting
A tutorial on capi subscription commerce. How to fire new-acquisition and rebill events so Meta optimizes against the right DTC cohort, not rebills.
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ATTRIBUTION·FEB 26·13 MIN
How to Fix Shopify Pixel and CAPI Duplicate Events
Step-by-step guide to fixing duplicate Meta conversions from Shopify Pixel and CAPI using event_id deduplication. Includes GTM setup and verification steps.
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ATTRIBUTION·FEB 19·12 MIN
Event_id strategy across Shopify Pixel, CAPI, and GTM
A shopify event_id strategy that holds across Pixel, CAPI, and GTM. Five steps with Liquid, GTM web, and server snippets from a Q2 2024 rebuild.
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ATTRIBUTION·FEB 14·8 MIN
Attribution windows after iOS and Android privacy updates
Field notes on how attribution windows ios android shifts changed what Meta and GA4 actually measure, and what DTC operators should do in 2026.
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ATTRIBUTION·FEB 5·13 MIN
Wiring CAPI events around Klaviyo flow triggers
A pattern-library look at capi klaviyo flow integration. Three DTC failure modes where server events and triggers fire out of order, and the fix.
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ATTRIBUTION·FEB 5·14 MIN
Pushing Meta CAPI match quality score from 6 to 9
A tutorial on meta capi match quality score improvement. The field-by-field moves that took a DTC Shopify store from a 6 to a 9 in a production rebuild.
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ATTRIBUTION·JAN 30·10 MIN
Why your Klaviyo CAPI events fire before consent is given
Klaviyo's server-side CAPI toggle skips your consent layer. Here's why that happens, what it exposes legally, and how to gate events on actual consent.
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ATTRIBUTION·JAN 20·13 MIN
The DTC stack audit I run before accepting any retainer
A 24-check audit across tracking, analytics, theme performance, and attribution I run before signing any retainer. Full checklist inside, with scoring.
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ATTRIBUTION·JAN 18·9 MIN
Stape vs self-hosted GCP for a server container
A decision log on stape vs gcp server container hosting for a Shopify CAPI rebuild. Costs, control, and the tradeoffs that changed my mind on the pick.
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ATTRIBUTION·JAN 15·11 MIN
What iOS 17 ATT actually breaks in pixel attribution
iOS 17 ATT breaks browser pixel firing on opted-out devices entirely. The incident, root cause, and server-side CAPI fix that restored 35% lost conversions.
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Why this matters.
Server-side tracking is the part of the DTC stack that quietly decides whether your ad spend is making money. The Meta pixel sees roughly 60-70% of what actually happened on a clean store; once iOS privacy and ad blockers compound, the gap widens. CAPI closes most of it, but only if event_id deduplication, hashed user data, and consent state are all correct on the same payload. Get any one of them wrong and Meta either undercounts conversions or double-counts them, both of which corrupt the optimization signal the algorithm uses to spend your budget.
The articles in this cluster cover the full chain: from the Shopify or Next.js side that fires the event, through the server endpoint that hashes and forwards it, into the Events Manager match-quality score, and back out to the bid surface. Each post is grounded in a real audit or rebuild, with code samples that work in 2026 (App Router, GA4, Consent Mode v2) instead of repeating 2022 advice.
If you run a $2-10M DTC store and your platform reports disagree by more than 10%, the leak is almost always in this layer. Start with the hub article, then read the dedup and consent-mode pieces before touching production.
Put this to work
Server-side tracking, dedup, and the math behind DTC attribution.
> Get the CAPI Leak ReportOther clusters
Shopify
DTC Shopify Infrastructure
Theme architecture, metafields, agent-orchestrated builds, Hydrogen decisions.
Healthcare
Healthcare & Compliance
HIPAA-aware Next.js, audit trails, and regulated DTC patterns.
Solo brand
Creative-Tech Solo Brand
The hybrid creative-director-who-codes operating system.
Pricing
Services Business & Pricing
Productizing services, pricing strategy, and the retainer exit.
Lifecycle
Email & Lifecycle Marketing
Klaviyo flow architecture, retention math, and the LTV playbook.
Agents
AI Agent Engineering
Claude Code sub-agents, MCP servers, skills, and the orchestration stack.
Analytics
Analytics & Data Infrastructure
GA4, BigQuery, and the warehouse-first analytics rebuild.
Conversion
Ecommerce Conversion & UX
PDP patterns, cart decisions, checkout extensions, and the CRO stack.
Programmatic SEO
Programmatic SEO & Content Ops
Scaling content without burning author brand authority.
Paid Social
Paid Social Performance
Meta, TikTok, and Google Ads for DTC operators who also own the data.
Brand
Brand Architecture & Design Systems
Visual identity, naming ladders, and design systems that scale with the business.
Shopify Apps
Shopify App Ecosystem
Selecting, configuring, and replacing the third-party stack on Shopify.
Fractional
Fractional Ops & Service Leadership
Running a high-leverage fractional practice without becoming an agency.
Image AI
Local AI Image Generation
Running Flux, Z-Image, and Qwen locally without the cloud-API bill.
Image Specs
Social & Print Image Specs
Every social and print dimension, with copy-paste numbers and ready-sized templates.