Every Cent Accounted For
Every calculation ties directly back to raw marketplace settlement reports. Complete ledger transparency.
PUBLIC SP-API PLATFORM — MULTI-TENANT ARCHITECTURE
Stop manual work.
Cut hidden fees.
Keep your real profit.
An open, public multi-tenant software application integrated via official Amazon SP-API. Serving independent brands (such as AnHome and Sunhouse) and global sellers with absolute cryptographic tenant isolation, zero-password OAuth, and a secure Non-PII design.
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ZERO BUSYWORK. MAXIMUM NET CASH.
$18.4M+
Audited FBA GMV
80%
Time Saved on Spreadsheets
99.6%
Reconciliation Accuracy
15 Min
Zero-Password API Setup
01 / THE REAL PROBLEMWHY PROFITS DRAIN AWAY
High sales volume,
so where did the cash go?
Most e-commerce and Amazon seller teams burn 2 to 3 hours every day downloading settlement CSVs, copy-pasting numbers into Excel, and cross-checking fees.
Between hidden storage surcharges, creeping PPC ad costs, and Amazon warehouses losing or damaging units without automatically crediting your account... your top-line revenue looks great, but your net bank payout is shockingly lean.
SunCroix applies software automation to end this cycle: we sync directly with official store APIs, audit every fee line item, and pinpoint unclaimed warehouse discrepancies so you can claim your cash back.
Explore Software FeaturesAutomated Data.Transparent Auditing.Defend Your Net Margin.
02 / CORE SOFTWARE TOOLSOPERATIONAL EFFICIENCY
Three automation tools.
Zero spreadsheet headaches.
Let software handle the repetitive accounting calculations
while your team focuses on launching winning products.
01Automated Store DashboardSP-API ROLE: FINANCE & ACCOUNTING
02Automated FBA RecoverySP-API ROLE: INVENTORY & TRACKING
03SKU-Level Profit EngineSP-API ROLE: PRICING & PRODUCT FEES
AMAZON SP-API ROLE: FINANCE AND ACCOUNTING
Unified financial command center. Every fee accounted for.
Direct integration with the Amazon Finances API and Settlement Reports (GET_V2_SETTLEMENT_REPORT_DATA_FLAT_FILE_V2). SunCroix automatically ingests, parses, and reconciles orders, PPC advertising costs, FBA fulfillment fees, storage surcharges, and currency conversions into an immutable, audit-ready financial ledger—eliminating manual CSV consolidation across multiple marketplaces.
AMAZON SP-API ROLE: FBA INVENTORY & ORDER TRACKING
Audit lost and damaged stock to claim cash Amazon owes you.
Using the official FBA Inventory API and movement ledger reports (GET_LEDGER_DETAIL_VIEW_DATA, GET_FBA_FULFILLMENT_CUSTOMER_RETURNS_DATA), SunCroix continuously audits up to 18 months of inventory receipts. It accurately identifies warehouse-damaged units, lost shipments, and uncredited customer returns, compiling compliant claim packages ready for submission under Amazon FBA Reimbursement Policy.
AMAZON SP-API ROLE: PRICING & PRODUCT FEES
Know exact net profit per SKU before ordering new inventory.
Integrated with the Amazon Product Fees API (getMyFeesEstimateForSKU) and catalog metadata to calculate precise unit economics for every ASIN/SKU. Deduct landed COGS, international freight tariffs, variable platform referral percentages, and dynamic ad attribution to defend net cash margins and avoid tying up working capital in unprofitable inventory.
03 / ONBOARDING & ARCHITECTUREZERO FRICTION & ZERO CREDENTIAL SHARING
Clean and secure.
Ready in under 15 minutes.
No complicated software to install.
Zero password sharing via official Amazon OAuth 2.0.
- 01
Official Amazon SP-API Authorization
Connect your seller account via 1-click consent on the Amazon Selling Partner Appstore using Login with Amazon (LWA) OAuth 2.0. We never ask for or store your Seller Central passwords.
- 02
Automated Historical Ingestion
Our background worker engine automatically ingests past settlement files, inventory ledger movements, and fee structures across all authorized marketplaces.
- 03
Audit Your Profit & Discrepancies
Instantly review real net profits, detect overcharged fulfillment fees, and review eligible FBA warehouse reimbursement claims ready for filing.
- 04
Run Lean and Efficient Every Day
Your team checks daily automated summaries in 5 minutes, making fast, data-backed restock and ad budget decisions without manual spreadsheet headaches.
AMAZON SP-API PRODUCTION ARCHITECTURE
Enterprise Security, Data Isolation & DPP Compliance
Architected strictly according to Amazon's Acceptable Use Policy (AUP) and Data Protection Policy (DPP) to serve independent sellers and brands.
01 / OAUTH 2.0 LWA
1-Click Appstore Handshake
Standard OAuth 2.0 authorization code flow via Login with Amazon (LWA). Zero password sharing. Merchants retain 100% control to revoke access instantly via Seller Central.
02 / ENVELOPE ENCRYPTION
Vault & KMS Key Management
API tokens and data encrypted at rest with AES-256 and in transit with TLS 1.3. Cryptographic keys managed in HashiCorp Vault with strict automated rotation schedules.
03 / MULTI-TENANT ISOLATION
Row-Level Security (RLS)
Independent multi-brand workspaces (e.g., AnHome and Sunhouse) are logically and cryptographically partitioned via PostgreSQL RLS. Cross-tenant queries are blocked at the engine level.
04 / PRIVACY & DATA PURGE
Non-PII & 30-Day Purge SLA
SunCroix never ingests buyer Personally Identifiable Information (no buyer names or addresses). When access is disconnected, all cached financial data is permanently purged within 30 days per Amazon DPP.
04 / HOW WE WORKOPERATOR-FIRST DISCIPLINE
Real software, real data.
No corporate fluff or empty promises.
Our core commitments to every seller who trusts SunCroix.
Measured in Real Cash
If our software doesn't save your team hours every week and recover real cash from warehouses, we haven't succeeded.
Direct Human Guidance
Support from experienced e-commerce operators who know cross-border selling inside and out.
05 / PRICING & PLANSSIMPLE & PREDICTABLE
Clear, transparent pricing.
No hidden costs, cancel anytime.
Choose the tier tailored to your marketplace footprint.
Start risk-free with our 14-day automated audit.
Sandbox Audit
For sellers wanting an immediate audit of FBA discrepancy claims and profit leaks.
$0 / 14 days
No credit card required • Read-only OAuth
- ✓ 1-Click official Amazon SP-API OAuth
- ✓ 18-month historical FBA inventory scan
- ✓ Detailed fee audit & eligible claim ledger
- ✓ 100% Non-PII secure architecture
RECOMMENDED TIER
Growth Operator
For active Amazon FBA brands automating daily bookkeeping and profit tracking.
$79 / month
Billed monthly • Zero lock-in contracts
- ✓ Everything in Sandbox Audit
- ✓ Daily automated settlement & order reconciliation
- ✓ SKU-level net profit calculation (COGS + Ads + Fees)
- ✓ Automated claim generation for lost/damaged units
- ✓ Priority 24/7 technical operator support
Enterprise & Multi-Brand
Tailored for independent sellers (e.g. AnHome, Sunhouse) and multi-brand agencies.
Custom / contract
Corporate invoicing • Dedicated SLA
- ✓ Strict database Row-Level Security (RLS) isolation
- ✓ Unlimited Seller Central store connections
- ✓ Dedicated HashiCorp Vault encryption keys
- ✓ Granular RBAC permissions (Owner, Finance, Ops)
- ✓ Dedicated solution engineer onboarding
05 / GET STARTEDAUDIT YOUR STORE
Streamline your store,
starting today.
Drop your store details below.
Our team will set up a sandbox connection and perform a free preliminary audit of your past FBA reimbursement potential.
PRACTICAL TECH.
REAL NET PROFIT.
REAL NET PROFIT.
REQUEST CONSULTATION
Get Your Store Audit.
Tell us about your store to receive an automated analysis plan.