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Shipstation Integraion
Inventory Optimizer connects to ShipStation and transforms orders from Amazon, Walmart, Shopify, eBay, Etsy, TikTok Shop, and 400+ more channels into one accurate demand forecast — with automated purchase orders and zero spreadsheets.
The problem
Multi-channel sellers are juggling demand signals from a dozen different places. Without one unified view, you’re always one stockout away from losing rank on your best marketplace.
ShipStation is already pulling orders from every channel you sell on. But without IO connected, that demand data stays in ShipStation and never makes it into your inventory forecast — leaving you planning blind.
Running out of stock on Amazon or Walmart doesn’t just lose you that sale — it drops your ranking and can take weeks to recover. Without a unified forecast, you never see it coming until it’s too late.
Amazon Warehousing and Distribution adds a powerful fulfillment layer — but managing AWD balances, utilization, and AWD-to-FBA replenishment manually is nearly impossible at scale.
A spreadsheet built for one channel breaks immediately when you add a second or third. Multi-channel demand forecasting requires a system that was built for it from the ground up.
Features
ShipStation brings the orders. IO turns them into forecasts, reorder recommendations, and purchase orders — automatically.
Every reorder recommendation is calculated from your actual ShipStation order history — not estimates or averages. When and how much to reorder is based on real demand from every channel you sell on.
When it’s time to reorder, IO generates a complete PO with the right quantities per supplier — based on your total cross-channel demand, not just one store’s numbers.
With a unified view of demand across all your ShipStation channels, IO helps you right-size inventory — so you’re not tying up cash in slow movers while your best sellers run out.
Getting Started
No implementation fees. No complicated setup. Connect ShipStation and every channel you sell on is in your forecast immediately.
Connect IO to ShipStation with one click. Your full order history across every connected marketplace syncs automatically — Amazon, Walmart, Shopify, eBay, Etsy, and all the rest.
Tell IO who your suppliers are, how long they take to deliver, and your minimum order quantities. This turns your ShipStation order data into reorder recommendations that reflect your actual supply chain.
IO runs 100+ forecasting models per SKU across your combined ShipStation demand and selects the most accurate one for each product — accounting for seasonality, velocity, and channel mix.
When it's time to reorder, IO generates a complete PO based on your total cross-channel demand. Review it, adjust if needed, and send directly to your supplier — no spreadsheets required.
What Amazon Seller Central Sellers are saying
FAQ
IO connects directly to your ShipStation account and pulls your full order history across every marketplace ShipStation supports. That demand data feeds into IO's forecasting engine, which generates a unified 12-month forecast and reorder recommendations across all your channels in one place.
Any marketplace connected to your ShipStation account is supported — including Amazon, Walmart, Shopify, eBay, Etsy, TikTok Shop, and 400+ more. If ShipStation can pull orders from it, IO can forecast from it.
No — ShipStation is one of several ways to connect your sales data to IO. If you sell on Amazon, Shopify, or QuickBooks, IO has direct integrations for those too. ShipStation is the best option if you sell across many marketplaces that don't have a direct IO integration.
No — IO is read-only from ShipStation. It pulls your order data in but never modifies anything in your ShipStation account. Your ShipStation data stays exactly as it is.
Most sellers connect ShipStation in under 5 minutes. Once connected, your order history syncs automatically and your first forecast is ready within 24 hours.
Plans start at $79.95/month and include a 14-day free trial with no credit card required. The ShipStation integration is included in all plans at no extra charge.
No credit card required. No long-term contracts. Cancel anytime.