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Can I vibe code Shopkeeper?

shopkeeper.com ↗·amazon-profit-analytics·$20/mo·tiered

NICHE — BUILD THE NICHE VERSION

What you pay Shopkeeper for is pre-built, approved integration with Amazon's Selling Partner API (SP-API), automatic ingestion of complex fee line-items, and real-time profit dashboarding. The financial math itself is basic arithmetic. Building an in-house version is easy if you already have SP-API credentials, but requesting new enterprise-level SP-API access for a custom app can take months of compliance reviews by Amazon. For a multi-SKU seller, $45/month is usually cheaper than maintaining custom SP-API data pipelines.

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The verdict

NICHE

Replaces

$45/mo

Vibe code score

5/10

MVP build time

2-3 weeks

Full replacement

4-6 months, due to Amazon SP-API approval barriers and complex fee mapping

Editorial opinion, produced with a published methodology from public information. Not a statement of fact about the vendor. How we score · Report an error · Pricing checked 2026-08-18

Shopkeeper

01

Why this verdict

Rebuilding the core calculation logic (Revenue - Amazon Fees - Ads - COGS = Net Profit) is simple. However, securing Amazon Selling Partner API (SP-API) developer access, adhering to Amazon Data Protection Policies, and mapping dozens of obscure Amazon fee codes requires significant technical effort.

Verdict

NICHE

Vibe code score

5/10

Moat strength

3/10

02

What it really costs

Sticker price versus what a real store ends up paying.

Entry$20/moTypical store$45/mo≈ estimated · 2026-08-18
Novice$20/moUp to 250 orders per month
Intermediate$45/moUp to 1,000 orders per month
Master$90/moUp to 5,000 orders per month

Billed monthly based on total Amazon order volume across connected seller accounts.

Where this number comes from
Captured
2026-08-18 (37 days ago)
Verified by
crawler

Assumptions: Billed monthly based on total Amazon order volume across connected seller accounts.

03

The one-shot build prompt

Paste it into your agent of choice. Nothing else needed.

The one-shot build promptbuild it on Lovable
Build an internal Amazon profit tracking tool in Next.js (App Router), Tailwind CSS, and PostgreSQL (via Prisma ORM).

1. DATA MODEL:
- Create schema for `Products` (ASIN, SKU, title, image_url).
- Create schema for `ProductCosts` (sku, cogs_amount, shipping_cost_per_unit, start_date, end_date).
- Create schema for `AmazonOrders` (order_id, purchase_date, marketplace_id, sku, quantity, gross_sales, currency).
- Create schema for `AmazonFees` (order_id, fee_type, amount, currency).
- Create schema for `AdSpend` (sku, date, spend, currency).

2. CORE FUNCTIONALITY:
- Build a REST endpoint `/api/sync/finances` that accepts raw Amazon SP-API Financial Event JSON payloads. Parse events: Principal (Revenue), FBAPerUnitFulfillmentFee, Commission (Referral), DigitalServicesFee, and StorageFees.
- Build a calculation engine: `Net Profit = Gross Revenue - (FBA Fees + Referral Fees + Storage Fees) - Ad Spend - (COGS + Unit Shipping)`.
- Calculate Margin % (`Net Profit / Gross Revenue * 100`) and ROI % (`Net Profit / Total Costs * 100`).
- Build a dashboard page with summary metrics (Total Revenue, Total Fees, Net Profit, Average Margin) filtered by date range (Today, 7D, 30D, Custom).
- Build a SKU-level profit breakdown table showing line-item costs per ASIN with editable COGS input fields.

3. FAILURE MODES & EDGE CASES:
- Support multi-currency orders by integrating a daily ECB exchange rate fetcher to convert all metrics to USD.
- Gracefully handle refunds: deduct original sale revenue and track refund admin fees.
- If COGS is missing for a SKU, highlight the row in yellow and flag net profit as 'Estimated'.

4. OUT OF SCOPE:
- Direct OAuth flow for external multi-tenant accounts (assume single-seller API keys stored in environment variables).
- Mobile push notifications.

$ each button prefixes agent-specific run instructions · build your own product, never copy proprietary code, trademarks or designs

04

Scorecard

Deterministic scoring, same method for every product.

Vibe code score

5/10

Moat strength

3/10

Technical difficulty6/10
Operational burden7/10
Integration depth6/10
Data advantage1/10
Network effects0/10
Compliance load3/10

05

What you keep, what you lose

The honest trade of rebuilding it yourself.

What you can actually replace

  • ✓Real-time net profit dashboard per SKU and order
  • ✓Manual COGS and freight cost input table per ASIN
  • ✓Amazon PPC ad spend attribution per product
  • ✓Refund and return cost impact calculator
  • ✓Multi-marketplace currency conversion

What you lose

  • ×Pre-approved Amazon SP-API production credentials
  • ×Automated parsing of obscure Amazon fee types (inbound placement, long-term storage, disposal fees)
  • ×Mobile push notifications for real-time sales and profit metrics
  • ×Built-in compliance with Amazon Data Protection Policy updates
  • ×Automated historical data backfilling on initial connect

06

Why people still pay — the real moats

Moats

  • — Amazon SP-API developer authorization barrier
  • — Normalisation engine for dozens of changing Amazon fee line items
  • — Historical snapshot data storage for long-term margin trends

Hard parts

  • — Navigating Amazon SP-API strict rate limits and asynchronous report generation
  • — Parsing and categorizing dozens of legacy and newly introduced Amazon FBA fees
  • — Handling token refresh routines and encrypted PII storage to satisfy Amazon's Data Protection Policy
  • — Reconciling delayed Amazon PPC spend data with real-time order revenue
  • — Passing Amazon's annual Developer Security Assessment audit
  • — Manually updating fee structures whenever Amazon alters FBA or referral fee schedules
  • — Ensuring accurate inventory COGS tracking across batch lots and restocks
  • — Handling edge cases like lost inbound inventory claims and customer return reimbursements

Build this instead

SP-API Financial Ingestion Engine

A background cron service built with Node.js/Python that fetches Amazon Financial Event Groups, Reports, and PPC spend daily into a PostgreSQL database.

Build this instead

ASIN Cost & Margin Manager

A simple internal Next.js table UI to enter landed COGS, shipping rates, and custom fixed costs per SKU over specific date ranges.

Build this instead

Custom Executive BI Dashboard

A SQL-backed dashboard using Metabase or Retool that displays real-time Net Profit, ROI, and Amazon fee breakdowns.

07

Prior art — do not start from zero

Existing projects and paid alternatives worth pricing first.

python-amazon-sp-api↗

Python wrapper for the Amazon Selling Partner API covering REST and LWA auth.

github.com

amazon-sp-api-php↗

PHP client SDK for connecting to Amazon's Selling Partner API.

github.com

metabase↗

Open-source business intelligence platform to visualize ingested profit metrics.

github.com

08

Open source alternatives to Shopkeeper

Self-hostable projects that cover most of the same ground. Free licence, your infrastructure, your on-call.

Metabase↗

AGPL-3.0

Open-source analytics tool usable as a customized profit dashboard once Amazon data is loaded.

github.com

Apache Superset↗

Apache-2.0

Data exploration and visualization platform to build custom financial dashboards.

github.com

n8n↗

Fair-code

Workflow automation platform to poll Amazon SP-API endpoints and write transactions to Postgres.

github.com

09

Have you actually replaced it?

One click, no account. It moves the ranking.

Community verdict

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Spend killed
$0/mo

10

Compare

Same category, different trade-offs.

AudienceProjectKEEP

An independent audience measurement platform providing cross-media reach, frequency, and demographic validation for publishers and advertisers.

$2,500/mo

CometlyNICHE

Cometly tracks first-party e-commerce sales and attributes them to ad campaigns using server-side pixels and API integrations. It bypasses browser privacy restrictions to show multi-touch attribution and feed conversion data back to ad networks.

$199/mo

ElevarNICHE

Server-side tracking that survives ad platform changes.

$150/mo

Shopkeeper vs AudienceProjectShopkeeper vs CometlyShopkeeper vs ElevarShopkeeper vs HotjarShopkeeper vs IntelligemsShopkeeper vs Lucky Orange

11

FAQ

+Can I really replace Shopkeeper with an AI-generated app?

MAYBE — EASY MATH, BUT AMAZON SP-API APPROVAL AND FEE STRUCTURES ARE BRUTAL. Rebuilding the core calculation logic (Revenue - Amazon Fees - Ads - COGS = Net Profit) is simple. However, securing Amazon Selling Partner API (SP-API) developer access, adhering to Amazon Data Protection Policies, and mapping dozens of obscure Amazon fee codes requires significant technical effort. An MVP takes roughly 2-3 weeks; matching the product properly is closer to 4-6 months, due to Amazon SP-API approval barriers and complex fee mapping.

+How long does it take to rebuild Shopkeeper?

A usable internal version: 2-3 weeks. A version you would sell or bet a business on: 4-6 months, due to Amazon SP-API approval barriers and complex fee mapping, mostly spent on navigating amazon sp-api strict rate limits and asynchronous report generation.

+What do you actually lose by leaving Shopkeeper?

Pre-approved Amazon SP-API production credentials Automated parsing of obscure Amazon fee types (inbound placement, long-term storage, disposal fees) Mobile push notifications for real-time sales and profit metrics

+Is it legal to build a Shopkeeper alternative?

Building a competing product with your own code is normal competition. Copying their code, trademarks, brand assets or scraping their platform is not. Use the prompt to build your own implementation of common features.

Written by EcomReStack research agent — 18 years in the Magento ecosystem. Last reviewed 2026-08-18.

Sources consulted

Scores are computed, not typed. Read the methodology.

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