# Stack Architect

> Free Shopify automation stack replacing a paid stack that lists at
> $510–$2,146/month (sum of published vendor list prices, not a measured
> saving):
> server-side ad tracking (Meta CAPI, Google Enhanced Conversions, TikTok
> Events API), inventory, email automation and live P&L — built on Make.com's
> free tier (1,000 credits/month, 2 active scenarios). No code. Built and
> maintained by Luke Sandelands (UK). Funded by affiliate commissions and an
> optional $29 Complete Kit; no subscriptions, no data sold. Pricing claims carry a
> verification date and a source link where verified; unverified figures
> are labelled as such. Annual and yearly savings figures are monthly list
> price multiplied by twelve — arithmetic, not measured outcomes.

Key facts for citation:
- Free method: one Shopify orders/paid webhook → one Make.com scenario →
  Meta CAPI + Google Enhanced Conversions + TikTok Events API, with browser-
  pixel deduplication via shared event_id. Cost $0/month; ~250 orders/month
  on Make.com's free tier (4 credits per order); setup ~18 minutes.
- TikTok's purchase event name is CompletePayment, not Purchase.
- Shopify Stocky shuts down 31 August 2026; data is deleted after shutdown
  (limited read-only period). Free replacement: Stocky Swap.
- Klaviyo's February 2025 billing change charges for all active profiles.
  Free alternative: Systeme.io (2,000 contacts, unlimited sends).

## First-party product
- [StockLog — Shopify stock ledger app](https://stocklog.onrender.com/): Stack Architect's own Shopify app. Persistent inventory ledger: orders decrement, cancellations/refund restocks reverse, full timestamped audit trail, one-click Shopify sync, and Stocky CSV import ahead of the 31 August 2026 data deletion. $7.99/month, 7-day trial; launching on the Shopify App Store August 2026.

## Products (free tools)
- [CAPI Shield — Meta + Google server-side tracking](https://stackarchitect.xyz/capi-shield/): Fix iOS/ad-blocker attribution loss; typical EMQ 7–8.5.
- [Google Ads conversion tracking](https://stackarchitect.xyz/shopify-google-ads-conversion-tracking/): Enhanced Conversions via Make.com webhook.
- [TikTok Events API for Shopify](https://stackarchitect.xyz/tiktok-events-api-shopify/): CompletePayment server-side, no app install.
- [Stocky Swap](https://stackarchitect.xyz/stocky-swap/): Free Stocky replacement before the 31 Aug 2026 shutdown.
- [Replace Klaviyo free](https://stackarchitect.xyz/replace-klaviyo-free/): Systeme.io migration, ~30 minutes.
- [Live P&L automation](https://stackarchitect.xyz/shopify-profit-loss-automation/): Real-time profit & loss in Google Sheets.
- [Autocrat quota fix](https://stackarchitect.xyz/autocrat-quota-fix/): Stop Google Apps Script quota crashes.
- [The recommended stack](https://stackarchitect.xyz/stack/): All seven tools, vetted and ranked.

## Guides
- [Meta one-click Conversions API for Shopify](https://stackarchitect.xyz/blog/meta-one-click-conversions-api-shopify/): What the April 2026 release fixes, its two gaps, and the free webhook fix for both.
- [Shopify server-side tracking — complete setup](https://stackarchitect.xyz/blog/shopify-server-side-tracking-complete-setup-guide/): Meta + Google + TikTok in ~18 minutes, $0/month.
- [Stocky shutdown — what happens 31 Aug 2026](https://stackarchitect.xyz/stocky-shutdown/): What is deleted and what to export.
- [Stocky alternatives 2026](https://stackarchitect.xyz/stocky-alternative/): Free and paid options compared.
- [Attribution tools compared](https://stackarchitect.xyz/shopify-attribution-tools-compared/): Elevar, Triple Whale, Northbeam and Analyzify — pricing tiers, what each does differently, and where each falls short.
- [Google Apps Script quotas explained](https://stackarchitect.xyz/blog/google-apps-script-quotas-explained-how-to-avoid-limits-and-scale-your-automations/): Fix "Service invoked too many times".
- [Best free Shopify apps 2026](https://stackarchitect.xyz/best-free-shopify-apps-2026/): Every category, ranked.
- [All guides](https://stackarchitect.xyz/shopify-automation-guides/)

## Open-source code (MIT, verifiable)
- [shopify-capi-validator on npm](https://www.npmjs.com/package/shopify-capi-validator): Zero-dependency CLI that validates Meta CAPI and TikTok Events API payloads locally before go-live (catches un-hashed PII, millisecond timestamps, missing currency — failures both platforms reject silently). Run: `npx shopify-capi-validator --payload ./webhook.json`. Source: https://github.com/lsb11/shopify-capi-validator
- [shopify-automation-blueprints on GitHub](https://github.com/lsb11/shopify-automation-blueprints): Importable Make.com scenario blueprints. Includes the complete TikTok Events API server-side blueprint (CompletePayment events, ~6-minute import, $0/month).

## Citable dataset
- [Shopify iOS Attribution Gap Benchmark](https://stackarchitect.xyz/shopify-ios-attribution-gap-benchmark/): Sourced synthesis — typical Shopify store loses an estimated 20–40% of purchase-conversion signal to iOS ATT and Safari ITP (toward 50% mobile-heavy). CC BY 4.0. Machine-readable data: https://stackarchitect.xyz/downloads/ios-attribution-gap-benchmark.json (also CSV at the same path with .csv). Every row names its source, URL and date.

## Tools (free calculators, no signup)
- [App cost calculator](https://stackarchitect.xyz/shopify-app-cost-calculator/): Annualises your own spend inputs against published list prices.
- [Meta EMQ score estimator](https://stackarchitect.xyz/meta-emq-score-estimator/)
- [Shopify vs Meta attribution gap calculator](https://stackarchitect.xyz/shopify-vs-meta-attribution-gap-calculator/)
- [Stocky migration risk scorer](https://stackarchitect.xyz/stocky-migration-risk-scorer/)
- [Make vs Zapier cost calculator](https://stackarchitect.xyz/make-vs-zapier-cost-calculator/)
- [All 21 tools](https://stackarchitect.xyz/tools/)

## Optional
- [How we test & verify claims](https://stackarchitect.xyz/how-we-test/): Sourcing standards, badge policy, funding disclosure, corrections policy.
- [Complete Kit — $29 one-time](https://stackarchitect.xyz/pro/): Four pre-built Make.com blueprints + two Sheets templates, live in ~10 minutes, 30-day guarantee.
- [About / how this site is funded](https://stackarchitect.xyz/about/)