
Guide to Inventory Sync & Integration: Cin7, Shopify & 3PLs
End Stock Chaos. Stop juggling spreadsheets. Implement real-world Inventory Sync & Integration across Cin7, Shopify, and your 3PL network.
SYSTEMS AND SOFTWARETUTORIALSECOMMERCE
Seamless inventory sync & integration: Cin7, Shopify & 3PLs


By Pierre Goldie, Co-founder & CGO @ Fiskal
The risks of scattered inventory data
Real-world pain: Oversells, stockouts and spreadsheets
Clients often come to us after a peak season scramble: overselling due to bad sync logic, then issuing refunds while manually updating spreadsheets. It’s costly, stressful, and completely avoidable.
Imagine this: orders fly in from Shopify, your 3PL ships out product, and Cin7 tries to make sense of it all. Except nothing quite lines up. Quantities are off. Orders appear twice. Customers get stockouts or late shipments. And someone is stuck updating a spreadsheet that’s always one step behind.
This is what happens when your systems operate in silos.
Inventory mismatches and sync loops are often the result of unclear system roles. Cin7 tries to overwrite Shopify, your 3PL updates both, and chaos ensues.
Impact on revenue, customer satisfaction & brand
Revenue at Risk: Stockouts can jeopardize 10-20% of peak season revenue.
Labor Costs: Manual reconciliation can drain 20+ hours per month.
Brand Reputation: Late shipments and backorders lead to poor reviews and lost trust.
Architecture of a robust inventory integration
Cin7 as your central ERP / WMS hub
Cin7 should act as the central source of truth for operational oversight. But it doesn’t need to control everything.
Core Modules: Products, Warehouses, Orders
Use Cin7 for costing, reporting, and historical tracking, not as the day-to-day stock master.
Shopify inventory integration essentials
Shopify should remain the sales and product master.
Use Shopify’s product object for SKUs; map those to Cin7 SKUs
Sync stock one-way: from 3PL to Shopify
Shopify pushes sales orders to Cin7
Handle bundles and variants in Shopify, map to Cin7 via BOMs or kits
3PL integration solutions: connecting your logistics partners
Common formats: EDI, CSV, API
Two-way sync:
Orders flow from Shopify to 3PL
Fulfillments and returns flow from 3PL to Shopify
Cin7 receives passive updates for visibility and reporting
Manage multiple 3PLs via one Cin7 instance
Webhooks vs. scheduled polling: choosing your sync method
Error-handling & retry logic best practices
Use webhooks for fulfillment events. Use polling for nightly stock audits.
Common Issues: timeouts, partial data, rate limits
Retry Strategy: Use exponential backoff over fixed retries
Implement logging and alerting for triage
Real-world benefits & multichannel inventory management
Quantifying the payoff
Error Reduction: Up to 80% fewer inventory discrepancies
Time Savings: 50% less manual reconciliation
Forecasting Accuracy: Less dead stock, tighter reorder logic
Mini case study: Client X’s success story
Challenge: Peak-season oversells and manual inventory adjustments
Action: Fiskal implemented webhook-based sync with custom error-handling
Result:
80% drop in inventory sync errors
20% revenue lift within 90 days
Cin7 inventory integrations: why Fiskal Finance stands out
Deep Cin7 expertise: implementation, support, training
One partner for end-to-end integration with 3PLs
SLA-backed support and onboarding workshops
Fiskal: Cin7 (formerly Dear Systems) experts
Deep Cin7 expertise: implementation, support, training
One partner for end-to-end integration with 3PLs
SLA-backed support and onboarding workshops
Client success snapshot
Client
Old School
Industry
eCommerce
Tech Stack
Shopify, Cin7 Core, Xero
Challenges before Fiskal
Difficulty integrating Shopify, Cin7, and Xero
Data integrity issues and fragmented processes
Unlocked only a fraction of the systems’ potential
Results
“Fiskal helped us plenty. Their expertise has been a game changer… If you’re in e-commerce, I can’t recommend Fiskal enough.”
— Daneel, Founder of Old School
The Fiskal advantage
We’re not just implementers — we become an extension of your team.
What we did
Diagnosed root causes across tech stack
Aligned Shopify, Cin7, and Xero with clean, connected processes
Delivered industry-specific implementation and advisory support

Client success snapshot
Client
Old School
Industry
eCommerce
Tech Stack
Shopify, Cin7 Core, Xero
Challenges before Fiskal
Difficulty integrating Shopify, Cin7, and Xero
Data integrity issues and fragmented processes
Unlocked only a fraction of the systems’ potential
Results
“Fiskal helped us plenty. Their expertise has been a game changer… If you’re in e-commerce, I can’t recommend Fiskal enough.”
— Daneel, Founder of Old School
The Fiskal advantage
We’re not just implementers — we become an extension of your team.
What we did
Diagnosed root causes across tech stack
Aligned Shopify, Cin7, and Xero with clean, connected processes
Delivered industry-specific implementation and advisory support

Fiskal: Cin7 (formerly Dear Systems) experts
Book your free Cin7 integration consultation
We’ll review your current architecture, identify sync risks, and map out the right system roles.
Book your integration health check
Written by:


Pierre Goldie, Chartered Global Management Accountant & Co-Founder at Fiskal
Specialist in eCommerce operations, financial systems, and post-implementation ERP recovery.
