The Client & Challenge
Klaviyo was new territory — for both us and our client
The client is a global leader in authentic yoga training and wellness courses. They needed precise, product-level event data — especially around payment steps — to optimize marketing and better understand their customers.
But Klaviyo’s usual client-side tracking? Not their thing. Instead, they roll server-side. That meant no easy plug-and-play — just a blank slate, and a whole lot of questions.
“We want to see exactly which product made someone hit ‘Add Payment Info’ — right inside Klaviyo.” Simple to say, a nightmare to nail.
Documentation was sparse. Tracking guidelines were cryptic. Product-level clarity was missing in action.
Server-side setup meant no standard plug-and-play solution — requiring custom engineering from scratch.
Product details weren’t surfacing in Klaviyo initially — payload alignment was a core challenge to solve.
Timing the event triggers perfectly was crucial — too early or too late and the data would lose its meaning entirely.
Where others saw barriers, we saw a puzzle to solve. Reverse-engineering Klaviyo’s tracking model was the key.
The Objective
Precise, product-level event data flowing into Klaviyo
The goal was clear: enable the client to see exactly which product triggered key checkout events, all within Klaviyo — powered entirely by server-side infrastructure.
Our Playbook
Four moves that cracked the server-side puzzle
DwiSol approached this challenge systematically — studying, reusing existing foundations, engineering precision triggers, and validating relentlessly until the data was perfect.
🔎 Deep Dive Into Klaviyo’s Server-Side World
We didn’t guess — we studied Klaviyo’s tracking model like detectives hunting clues, reverse-engineering what made it tick.
♻️ Reuse, Don’t Reinvent
The client already had a GA4-standard ecommerce data layer. So we leveraged that solid foundation, saving time and headaches.
🎯 Precision Triggering
We built a custom server-side “Add Payment Info” trigger that fired only when it mattered, passing all the juicy details — item_name, product_name, and more.
✅ Validation Marathon
We tested every event in Klaviyo’s backend until the data was flawless and real-time, ensuring nothing slipped through the cracks.
The Hurdles
Engineering through limited docs and tricky edge cases
The path to a clean solution wasn’t without friction. Each obstacle required focused problem-solving and creative engineering to overcome.
Klaviyo’s limited docs meant lots of trial and error — we filled in the gaps through systematic testing and experimentation.
Product details weren’t showing up initially, so we aligned the payload exactly with Klaviyo’s specifications until every field appeared correctly.
Timing the event triggers perfectly was crucial — too early or too late and the data would lose meaning entirely in Klaviyo’s system.
But with laser focus and some creative engineering, we made it happen — turning a tricky build into a reliable, scalable system.
The Solution
A scalable server-side tracking system, step by step
The final implementation tied together Klaviyo’s server-side API with the client’s existing GA4 data layer — producing clean, real-time product event data with zero noise.
01
Foundation
Leveraged the existing GA4-standard ecommerce data layer
Rather than rebuilding from scratch, we leveraged the client’s existing GA4 ecommerce data layer as the foundation. This saved significant time and provided a battle-tested, structured source of product and event data to work from.
02
Custom Trigger Engineering
Built a precision “Add Payment Info” server-side trigger
We engineered a custom server-side trigger that fires exclusively at the “Add Payment Info” checkout step — capturing the exact product data at the precise moment of maximum intent. The trigger passes all required details including item_name, product_name, and other key fields.
| Field | Description | Type |
|---|---|---|
| item_name | Name of the individual product item in the cart | Required |
| product_name | Display product name passed to Klaviyo event | Required |
| Event Type | Add Payment Info — maps to checkout intent signal | Required |
| Custom Properties | Additional product metadata for segmentation | Enhanced |
03
Payload Alignment
Aligned every payload field exactly with Klaviyo’s specifications
A key hurdle was getting product details to appear in Klaviyo’s backend. Through systematic testing, we aligned the server-side payload precisely with Klaviyo’s API requirements — ensuring every property rendered correctly within the Klaviyo event stream without discrepancy.
04
Validation & Quality Assurance
Tested every event until the data was flawless and real-time
We ran a comprehensive validation marathon — testing every event scenario in Klaviyo’s backend, verifying real-time data flow, and confirming that no events were missed or duplicated. The result: a clean, reliable signal that the marketing team could act on with full confidence.
Tech Stack
Server-side precision, built on proven foundations
Every component was chosen to maximize reliability, minimize client-side dependency, and ensure long-term scalability — no third-party middleware, no fragile client-side scripts.
Klaviyo Server-Side API
GA4 Ecommerce Data Layer
Google Tag Manager (Server-Side)
Custom Event Triggers
Real-Time Validation Testing
The Result
From shooting in the dark to running data-powered campaigns
The brand went from having no product-level visibility inside Klaviyo to a sleek, scalable server-side tracking system delivering crystal-clear product event data — in real time, with no noise and no guesswork.
01
Precise Product Visibility
Klaviyo now shows exactly which product triggered the “Add Payment Info” event — the exact insight the client needed to optimize campaigns.
02
Smarter Targeting
Product-level event data unlocks precise audience segmentation and behavioural targeting — smarter data means sharper targeting and stronger sales.
03
Clean, Scalable Infrastructure
A sleek server-side tracking system that delivers validated, real-time data — scalable as the brand grows and adds more products and campaigns.
04
No Noise, No Guesswork
The rigorous validation process ensures every event is accurate and meaningful. The marketing team can make decisions with full confidence in the data.
05
Full Data Revolution
This wasn’t just a tracking fix — it was a full-on data revolution. When the usual tools won’t cut it, we build the ones that do.
Because good data isn’t optional — it’s unstoppable. The brand went from shooting in the dark to running campaigns powered by sharp, validated insights. Smarter data, sharper targeting, stronger sales.
— DwiSol, Post-Implementation Summary
Ready to supercharge your Klaviyo with clean data?
DwiSol specializes in server-side tracking and data-driven analytics. When the usual tools won’t cut it, we build the ones that do.