Do I need to connect both Shopify and Amazon at the same time?

No. You can connect one channel first and add the other later. ReplenishRadar works with a single channel, but the real value shows up when both are connected and you get unified inventory and combined demand forecasting.

How does SKU matching work if my SKUs are different on each platform?

When you connect both channels, ReplenishRadar attempts to match products automatically by SKU, ASIN, UPC, or EAN. If automatic matching misses a product, you can match it manually in the catalog view. Once matched, that link is permanent and all future syncs respect it.

Does ReplenishRadar modify data on either platform?

Shopify access is strictly read-only. On Amazon, the only write action is creating FBA inbound plans, and that only happens when you explicitly click "Create Inbound Plan." We never change prices, edit listings, or adjust stock levels on either platform.

How quickly do stock changes show up in the unified dashboard?

It depends on your plan. Shopify inventory syncs range from every 30 minutes (Standard) to every 2 minutes (Enterprise). Amazon FBA inventory follows the same schedule. Amazon orders sync via SQS every 2 minutes on all plans. You can also hit the Instant Refresh button for an immediate pull from either channel.

Can I see which channel is selling faster for a given product?

Yes. The demand forecasting view breaks down sales velocity by channel. You can see Shopify vs. Amazon demand side by side, plus the combined total that drives your reorder calculations.

What if I sell different products on Shopify and Amazon?

That works fine. Products that exist on only one channel show up in your dashboard with data from that channel. Products that exist on both channels get unified views with combined metrics. You do not need to sell the same catalog on both platforms to benefit from the unified dashboard.

Shopify + Amazon Inventory Sync

Selling on both Shopify and Amazon means your inventory is split across two platforms that do not talk to each other. ReplenishRadar connects both channels into a single dashboard with unified stock levels, combined demand forecasting, and one set of reorder alerts.

The Multi-Channel Problem

If you sell on both Shopify and Amazon, you already know the pain. Your inventory lives in two separate systems with different data formats, different update schedules, and no shared view of what you actually have in stock.

The result is predictable:

No single source of truth. You check Shopify for warehouse stock, then switch to Seller Central for FBA levels. Spreadsheets fill the gap. Numbers drift.
Demand is invisible across channels. A product selling well on Amazon and steady on Shopify looks like two separate stories. You miss the combined demand signal that should drive your purchasing.
Reorder timing breaks down. Without unified demand data, you either order too much (tying up cash) or too little (losing sales on whichever channel runs out first).
FBA replenishment is disconnected. You know you have warehouse stock in Shopify. You know FBA is running low. But the two systems do not coordinate, so you are manually calculating what to send to Amazon.

ReplenishRadar solves this by connecting both platforms and giving you one unified view of inventory, demand, and reorder needs.

How ReplenishRadar Connects Both

We use the official integration method for each platform. No screen scraping, no CSV imports, no credential sharing.

Shopify via OAuth. Click “Connect Shopify,” approve permissions on Shopify's authorization screen, and your products, inventory levels, orders, and locations start syncing automatically. Read-only access. Setup takes about five minutes.
Amazon via SP-API. Click “Connect Amazon,” authorize through Seller Central, and your FBA inventory, order history, and inbound shipments begin flowing. Amazon orders sync via SQS for near real-time updates.
Unified catalog with SKU matching. Once both channels are connected, ReplenishRadar matches products across platforms using SKU, ASIN, UPC, or EAN codes. Automatic matching handles most products. Anything it misses, you can match manually in one click.

After setup, every sync pulls the latest data from both channels into a single inventory picture. No manual reconciliation.

What You Get

Unified inventory dashboard

See stock across every Shopify location and every Amazon fulfillment center in one view. No more switching between Shopify Admin and Seller Central to piece together your inventory position.

Combined demand forecasting

Forecasts aggregate demand from both Shopify orders and Amazon sales. You see total demand per product, broken down by channel, so your purchasing reflects the full picture.

Cross-channel reorder alerts

Reorder points account for sales velocity across both channels. When combined demand is about to outrun your supply, you get an alert before either channel stocks out.

FBA transfer planning

ReplenishRadar knows your Shopify warehouse stock and your FBA levels. It recommends how much to send to Amazon based on FBA demand, current FBA stock, and what you have available in your warehouse.

Single purchase order workflow

One purchase order covers demand from both channels. ReplenishRadar calculates the total quantity you need, factoring in Shopify and Amazon demand, current stock, lead times, and safety stock targets.

SKU Matching Across Channels

The foundation of multi-channel inventory is knowing that “Product A” on Shopify is the same as “Product A” on Amazon. ReplenishRadar handles this through a layered matching process:

SKU match. If the same SKU string exists on both platforms, we link them automatically. This is the most common match type for sellers who use consistent SKU naming.
ASIN/barcode match. If SKUs differ but both listings share an ASIN, UPC, or EAN, we match on that identifier instead.
Manual match. For products that cannot be matched automatically, the catalog view shows unmatched items from each channel side by side. Click to link them. Once linked, the match persists through all future syncs.

After matching, every metric in ReplenishRadar (stock position, demand forecast, reorder point, days of supply) uses the combined data from both channels.

Sync Frequency by Plan

Plan	Shopify Sync	Amazon Inventory	Amazon Orders (SQS)
Standard (~~$119~~ $99/mo)	Every 30 min	Every 30 min	Every 2 min
Growth (~~$249~~ $199/mo)	Every 15 min	Every 15 min	Every 2 min
Scale ($499/mo)	Every 5 min	Every 5 min	Every 2 min
Enterprise	Every 2 min	Every 2 min	Every 2 min

All syncs are incremental. We only pull records that changed since the last run. Amazon order sync via SQS runs every 2 minutes on all plans because it is event-driven. All plans include Instant Refresh for on-demand pulls from either channel.

Shopify + Amazon Inventory Sync

The Multi-Channel Problem

How ReplenishRadar Connects Both

What You Get

SKU Matching Across Channels

Sync Frequency by Plan

Frequently Asked Questions

Connect Shopify and Amazon in under 10 minutes

Related Pages

Shopify Integration

Amazon Integration

Multi-Channel Planning