A builder brand that turns
problems into systems
Systems do the work, you live your life.
We structure recurring problems and solve them with data and code. The time you win back goes to the work and life that matter more.
MCPY What McPY does
About McPY
Find problems
We surface bottlenecks and inefficiencies in marketing and business with data.
Design structure
We connect data and workflows into reusable structures.
Build
We combine code, no-code and APIs to prototype fast.
Automate
We automate repetitive work and boost efficiency with AI.
Record & share
We turn results and insights into tools and content.
Selected Projects
Real problems solved, proven with verified numbers.
From untrackable
to measurable
Reconnected offline conversions between form submission and actual contract with server-side GTM, unified person_id and hashed call matching
identity resolutionsGTM
R² 0.30 → 0.74
Decomposed 16 YouTube sponsorship channels with adstock lag regression, producing a budget guide worth about KRW 134M per year
BigQueryPython
Definition-build
drift removed
A single-source build script generates the spreadsheet, TypeScript types and GTM container at once
GTMTypeScript
CPA
cut 82~95%
Lead cost down from about KRW 200K to 10K~35K with a hand-built CRM and campaign stack
PHPMeta CAPITools by McPY
Tools built with a builder's eye, to solve problems faster.
Insights / Blog
A builder's thinking, experiments and insights.
Digital Marketing Analytics
46 Events, 14 Parameters We Chose Not to Send: How to Design an Event Taxonomy
Digital Marketing Analytics
You Can Write a UTM Convention, but GA4 Never Reads Your Table
Digital Marketing Analytics
Impressions Are Not the Number in Your Ad Report: Measuring Off-Site Exposure Channel by Channel
Digital Marketing Analytics
A Search Console Only Shows You Your Own Half: Counting 380 Naver SERP Slots Over Four Weeks
More to come
We connect technology, creativity and everyday experience into more useful products, content and brands.
Team & Company
Builders gathering for bigger value
SaaS Subscriptions
Repeatable tools as a subscription
IP & Character
McPY and friends, expanding
Offline Experience
Coffee, goods and spaces
Frequently Asked Questions