Sending a purchase order to a prep center usually means a second trip: log into the prep center’s portal, create an inbound shipment, then copy over item details from the PO by hand.
Do that across multiple suppliers and prep centers every week, and it adds up to a lot of repeated data entry – with plenty of room for a mismatched quantity or missed SKU along the way.
Seller Assistant’s Prep Center Integration removes that extra step. Once a supported prep center is connected to Seller Assistant, warehouses sync automatically, and purchase orders can be sent as inbound shipments directly from the PO screen.
This post walks through how the connection works from setup to shipment.
Beyond Auto-Fill: Why Prep Centers Need Their Own Sync
Saving a prep center’s address and other data in your purchasing system is only part of the solution. As your Amazon business grows, you need warehouse information that stays synchronized with your prep center, integrates with your purchasing workflow, and eliminates repetitive work.
That’s where Prep Center Integration comes in. Instead of treating prep centers as static warehouse records, Seller Assistant connects them directly to your account, keeping fulfillment locations current and making them available throughout your sourcing and purchasing workflow.
Stored warehouse records become outdated
Prep center information can change over time, including warehouse locations and operational details. Synchronization helps ensure you’re always working with the latest fulfillment data.
Manual updates create duplicate work
Maintaining the same warehouse records in both Seller Assistant and your prep center portal wastes time and increases the chance of inconsistencies. Integration keeps the two systems connected.
Switching between platforms slows fulfillment
Without integration, sellers must move between Seller Assistant and their prep center portal to recreate shipment information. A connected workflow keeps purchasing and prep operations in one place.
Synced warehouses improve routing
Connected prep center warehouses appear directly in Warehouses Database, making them available whenever you need to assign fulfillment locations to purchase orders.
Purchasing and prep stay connected
Prep Center Integration links purchasing with fulfillment by allowing purchase orders to create inbound shipments for connected prep centers, reducing manual handoffs between systems.
Connected workflows scale more easily
As you add suppliers, warehouses, and prep centers, synchronized fulfillment data helps keep operations organized while reducing manual maintenance and routing errors.
What Is Prep Center Integration?
Seller Assistant’s Prep Center Integration is a fulfillment integration tool that connects supported prep center accounts directly to Seller Assistant. Instead of managing prep center locations and inbound shipments separately, sellers can synchronize warehouse data, keep fulfillment locations up to date, and work with their prep center as part of the same purchasing workflow.
As purchasing volume grows, manually maintaining warehouse records and recreating inbound shipments in multiple systems becomes time-consuming and increases the risk of routing errors. Prep Center Integration eliminates these repetitive tasks by connecting Seller Assistant with your prep center, helping keep fulfillment data synchronized and purchasing operations more efficient.
Once connected, the integration automatically imports warehouse locations from the prep center into Warehouses Database, where they’re marked as synced and available throughout Seller Assistant. Sellers can then use these synced locations in purchase orders and create inbound shipments directly from the PO view, reducing manual work, eliminating duplicate data entry, and keeping purchasing and prep operations connected in one platform.
Prep Center Integration at a glance
| Area | Description |
|---|---|
| Prep center connectivity | Connect supported prep center accounts directly to Seller Assistant using secure API credentials. |
| Automatic warehouse sync | Import warehouse locations from your connected prep center and keep them synchronized automatically. |
| Synced warehouse records | View imported fulfillment locations in Warehouses Database, clearly marked with a Synced badge and provider label. |
| Purchase Order integration | Use synced warehouses when creating and managing purchase orders, ensuring inventory is routed to the correct prep center. |
| Direct inbound shipment creation | Send purchase orders to your connected prep center as inbound shipments without leaving Seller Assistant. |
| Shipment tracking | View shipment status and open linked prep center shipments directly from the purchase order. |
| Centralized fulfillment workflow | Manage prep center connections, warehouse routing, and purchasing from one platform instead of switching between multiple systems. |
What Can You Do with Prep Center Integration?
Prep Center Integration connects your prep center directly to Seller Assistant, making fulfillment data available across your purchasing workflow. Instead of managing warehouse locations and inbound shipments in separate systems, you can synchronize prep center data, route purchase orders more efficiently, and reduce repetitive administrative work.
Connect supported prep centers
Link a supported prep center to Seller Assistant using your Merchant ID and API Token to establish a secure connection.
Synchronize warehouse locations
Automatically import warehouse locations from your prep center into Warehouses Database, eliminating the need to create duplicate warehouse records.
Keep fulfillment data current
Maintain up-to-date warehouse information through automatic synchronization instead of manually updating fulfillment records.
Manage synced warehouses
View synced prep center locations alongside manually created warehouses, clearly identified with a Synced badge and provider label.
Use synced warehouses across Seller Assistant
Select synchronized warehouse locations wherever fulfillment destinations are required, including the Purchase Orders Module.
Create inbound shipments from purchase orders
Send purchase orders directly to your connected prep center as inbound shipments without switching to the prep center’s portal.
Track linked prep center shipments
Monitor shipment status and open the associated shipment in your prep center directly from the purchase order.
Manage prep center connections
Disconnect an existing prep center or request support for additional providers as your fulfillment network expands.
How Prep Center Integration Works
Prep Center Integration connects Seller Assistant with supported prep center providers, allowing fulfillment data to move automatically between the two systems. Instead of manually recreating warehouse records and inbound shipments, sellers can synchronize prep center locations, reuse them in purchase orders, and manage prep operations from the same workflow.
Located in the Integrations section of Seller Assistant, the integration extends Warehouses Database and Purchase Orders Module by keeping fulfillment locations synchronized and enabling direct communication with your prep center. This creates a more connected purchasing process while reducing repetitive administrative work.
Connecting your prep center
Getting started takes only a few steps. Open the Prep Centers section in Integrations, choose a supported provider, and connect your account using your Merchant ID and API Token. Once Seller Assistant verifies your credentials, the integration is activated automatically.
Connecting the two systems eliminates the need to maintain separate fulfillment records and creates a direct link between Seller Assistant and your prep center.
Synchronizing warehouse locations
After the connection is established, Seller Assistant automatically imports warehouse locations from your prep center into Warehouses Database. Imported locations appear alongside manually created warehouses and are clearly identified with a Synced badge and provider label.
Because synchronized warehouses are managed through the integration, there’s no need to recreate or manually update the same fulfillment locations in multiple systems.
Using synced warehouses in purchase orders
Synchronized prep center locations become available directly in Purchase Orders Module. When creating or editing a purchase order, you can select a synced warehouse from the warehouse dropdown just like any other fulfillment location.
This keeps warehouse routing consistent and ensures supplier orders use the same fulfillment data stored in your connected prep center.
Creating inbound shipments
For purchase orders assigned to a synced warehouse, Seller Assistant displays a Send to prep button in the PO header. Clicking it creates an inbound shipment in your connected prep center without requiring you to open the provider’s portal or manually re-enter order information.
After the shipment is created, the purchase order displays the shipment status and a direct link to the prep center, allowing you to continue working from the same screen.
Managing connected prep centers
Prep Center Integration is designed to remain flexible as your fulfillment network changes. You can disconnect a prep center at any time, while Seller Assistant preserves historical warehouse references in existing purchase orders. If your preferred provider isn’t currently supported, you can submit an integration request directly from the Prep Centers page to help expand the available integrations.
Connected fulfillment workflow
Prep Center Integration works alongside Warehouses Database, Purchase Orders Module, and FBA Shipments to create a connected fulfillment workflow. Warehouse locations synced from your prep center are automatically stored in Warehouses Database, where they’re available for routing inventory in purchase orders without maintaining duplicate records or switching between systems.
When a purchase order is assigned to a synced warehouse, it can be sent directly to the connected prep center as an inbound shipment. From there, inventory continues through FBA Shipments and on to Amazon, allowing Seller Assistant to connect warehouse management, prep operations, purchasing, and fulfillment in one streamlined workflow.
How Prep Center Integration Works Step by Step
Step 1. Open the Prep Centers page
Go to Integrations → Prep Centers in your Seller Assistant account. The page displays all supported prep center providers, whether you’ve already connected one or not.
This is your central hub for managing prep center integrations and discovering supported providers.
Step 2. Choose a prep center
Click the card for the prep center you want to connect, then open its integration page.
Each provider has its own connection settings, allowing you to manage integrations individually.
Step 3. Connect your account
Click Connect prep center, then enter your Merchant ID and API Token from your prep center account.
Seller Assistant uses these credentials to establish a secure connection and communicate with your prep center.
Step 4. Sync warehouse locations
After your credentials are verified, Seller Assistant automatically imports warehouse locations into Warehouses Database, where they’re marked with a Synced badge.
You no longer need to recreate or manually update the same warehouse records in multiple systems.
Step 5. Send purchase orders to prep
For purchase orders assigned to a synced warehouse, click Send to prep to create an inbound shipment directly in your connected prep center. The purchase order then displays the shipment status and a direct link to the prep center.
This eliminates manual shipment creation and keeps purchasing and prep operations connected in one workflow.
Step 6. Manage the integration
Disconnect a prep center when needed or request support for additional providers directly from the Prep Centers page. If a purchase order is already linked to a prep center shipment, unlink it before changing the assigned warehouse.
You can adapt your fulfillment network as your business evolves while maintaining accurate routing and purchase order history.
FAQ
Do I need to recreate my prep center warehouses in Seller Assistant after connecting?
No. Once the connection is established, supported prep center warehouses are imported automatically into Warehouses Database. These synced records are managed through the integration, so creating duplicate manual warehouses isn’t necessary.
Can I connect more than one prep center?
At launch, Seller Assistant supports PrepBusiness as the first integrated provider. If your prep center isn’t available yet, you can request support directly from the Prep Centers page to help prioritize future integrations.
What happens if I disconnect a prep center?
Disconnecting removes the synchronization with that provider, and synced warehouse records are removed from the active warehouse list. Existing purchase orders keep the warehouse name they used, preserving your purchasing history.
Why are some products missing from the inbound shipment?
Products without a resolvable SKU are skipped during shipment creation. Reviewing SKU data before sending purchase orders to prep helps ensure all intended items are included in the shipment.
Is Prep Center Integration included in every Seller Assistant plan?
No. Prep Center Integration is available as a Business plan feature. Once enabled, it integrates seamlessly with the Warehouses Database, Purchase Orders Module, and the rest of your fulfillment workflow.
Final Thoughts
Prep Center Integration eliminates one of the most time-consuming parts of Amazon fulfillment – manually keeping warehouse records synchronized and recreating inbound shipments across multiple systems. By connecting your prep center directly to Seller Assistant, you can keep fulfillment locations current, simplify warehouse routing, and reduce repetitive administrative work throughout the purchasing process.
Working alongside Warehouses Database, Purchase Orders Module, and FBA Shipments, Prep Center Integration creates a connected fulfillment workflow from supplier orders to Amazon. Whether you manage a single prep center or plan to expand your fulfillment network, integrating your prep operations helps improve routing accuracy, streamline purchasing, and move inventory to Amazon more efficiently.
Seller Assistant automates and connects every stage of your Amazon wholesale and arbitrage workflow. It brings together in one platform: workflow management tools – Purchase Orders Module, Suppliers Database, Product Database, Warehouses Database, FBA Shipments, bulk research & sourcing tools – Price List Analyzer, Bulk Restriction Checker, AI Supplier Finder, Brand Analyzer, Seller Spy, Chrome extensions – Seller Assistant Browser Extension, IP-Alert Extension, and built-in VPN by Seller Assistant, and integrations & team access features – seamless API connectivity, integrations with Zapier, Airtable, and Make, and Virtual Assistant Accounts.
