Marketplace Integration Services
Selling across Amazon, Walmart, eBay, HSN and Shopify usually means checking each platform separately for orders, stock and pricing. We connect every channel to one ERP, each in the way that channel requires: EDI, API or file exchange. Orders, inventory and accounting then stay in step without a person reconciling them by hand.
+ RULES
The scope, and what has to get right.
- Order aggregation across channels. Orders from every marketplace land in one dashboard with unified status, instead of separate portals someone checks in turn.
- Inventory pushed to each channel. The ERP pushes stock quantities to connected channels on a schedule, so one channel does not keep selling stock another has already sold. Walmart is the exception. Walmart keeps its own count, and the ERP mirrors it in a dedicated location.
- Accounting kept in step with what shipped. Marketplace orders sync into QuickBooks or your ERP's accounting module automatically, matching what was actually fulfilled.
Inside the system, not bolted on.
Each marketplace as its own integration
Amazon, Walmart, eBay and Shopify each have their own API and rules, mapped separately even though they land in the same ERP dashboard.
Built into your existing ERP
Marketplace data flows into the system you already run, not a separate multi-channel tool with its own database to reconcile.
Automation layered on top
Shipping label generation, rate-shopping and OCR-based document matching connect to marketplace orders the same way they connect to any other order source.
Multi-marketplace ERP, EDI and logistics automation for a US consumer electronics brand
- Off Sage, with the operating history intact: Customers, vendors, items and transaction history were migrated from Sage into a browser-based ERP covering order-to-cash and procure-to-pay, with a full general ledger, receivables and payables, so the business changed systems without losing its records.
- Native EDI inside the ERP: Every X12 document, including 850, 855, 856, 810, 846 and 997, is read and generated inside the ERP using the EdiFabric .NET library, with the mapping in its own code and no external translation service. Amazon Vendor Central (Wholesale and Direct Fulfillment) and Adorama connect directly over SFTP. Best Buy Optics, Costco Wholesale and Colony Brands run through SPS Commerce. Best Buy Purchasing, Bluestem Brands, QVC, Staples Advantage and Staples the Office Superstore run through CommerceHub (Rithum). BI Worldwide and Mason Companies run through Radial. The ERP uploads its own files to each network's FTP and reads the files the network delivers, and the network validates them and delivers them to the retailer. HSN, Harco Industries, Knocking and Verdi Commerce run on automated file exchange over FTP. Scheduled EDI jobs poll FTP on schedules as short as every ten minutes. Walmart runs through its API. The Walmart API integration imports WFS and seller-fulfilled orders, sends shipment confirmation and tracking back for seller-fulfilled orders, marks WFS orders shipped and invoices them automatically, turns returns into credit memos, and creates WFS inbound shipments. Every job is tracked on a monitoring dashboard.
- Every channel in one order queue: Amazon Vendor Central and Seller Central (SP-API), Walmart, HSN, QVC, Costco, several Shopify storefronts, eBay and direct wholesale accounts land in one system. Vendor Central purchase orders are accepted or rejected back to Amazon from the same screen that shows system, 3PL and allocated stock.
- Multi-warehouse and multi-3PL stock: Real-time inventory across an owned warehouse operated with a logistics partner, a second third-party warehouse and Amazon fulfillment locations, with warehouse transfer orders and an Amazon inbound shipment request action for FBA.
- FBA inbound shipment automation: End-to-end FBA inbound automation via SP-API: shipment creation, selection of the lowest-cost shipping plan, packing slip generation, label download and routing to the warehouse.
Also relevant: ERP and automation for a refurbished hardware reseller
Common questions.
Which marketplaces do you integrate with?
Amazon, through Vendor Central EDI and SP-API. Walmart, through its Marketplace API. HSN, through automated file exchange. Shopify and eBay, through their APIs. Each is mapped as its own integration into your ERP.
Does this replace checking each marketplace's own seller dashboard?
For day-to-day operations, yes. Orders and inventory are managed from your own system, though each marketplace's dashboard remains available for platform-specific settings.
Can this prevent overselling across channels?
That is what the inventory push is for. The ERP pushes stock quantities to connected channels on a schedule, so a sale on one channel reduces what the others can sell. Walmart is the exception. Walmart keeps its own count, and the ERP mirrors it in a dedicated location instead of pushing quantities.
How does this connect to accounting?
Marketplace orders sync into QuickBooks or your ERP's accounting module as they ship, so accounting reflects actual fulfillment rather than a manual reconciliation at month end.
How many portals do you check every morning?
Tell us which marketplaces you sell on and we will tell you what unifying them into one system would actually remove from your day.