Amazon Vendor Central Wholesale EDI
Amazon Vendor Central Wholesale means Amazon buys your inventory outright and resells it. Orders arrive as 850 purchase orders, you acknowledge, ship to an Amazon fulfillment center, send an 856 advance ship notice and an 810 invoice, all mapped directly inside your ERP rather than through a middleware provider.
+ RULES
The scope, and what has to get right.
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850Purchase order from Amazon. Amazon issues a PO for inventory it will own outright, mapped into a real order in your ERP with Amazon's SKUs matched to yours. -
855Acknowledgment. You confirm quantity, cost and ship date back to Amazon before fulfillment begins. -
856Advance ship notice, to an Amazon FC. Carrier and pack structure have to match what Amazon expects for inbound to its fulfillment center, or the ASN is rejected on arrival. -
810Invoice. Billed to Amazon after shipment, matched line for line against the ASN. -
997Functional acknowledgment. Confirms Amazon received the transaction cleanly.
Inside the system, not bolted on.
Mapped directly in your ERP
The same transaction-set mapping approach used across all our EDI work, so Wholesale sits in the same codebase as your other trading partners.
ASN and invoice kept in sync
The 810 is generated from the same shipment data as the 856, so a mismatch between what shipped and what was billed cannot happen silently.
Direct connection to Amazon
AS2 or SFTP straight to Amazon's EDI gateway, with no SPS Commerce or Rithum layer and no per-document cost.
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: Direct trading-partner connections for Amazon Vendor Central, Walmart, HSN, QVC and Costco with 850, 855, 856, 810, 846 and 997 documents, polled on schedules as short as ten minutes. Every job is tracked on a monitoring dashboard, and there is no third-party EDI middleware in the chain.
- 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.
- International purchasing and landed cost: Ocean and air freight purchase orders carry ETD, bill of lading, ETA and vessel details, and the ERP calculates landed cost at receiving from tariff classification, duty, tariff, harbor surcharge and freight per item.
Common questions.
How is Wholesale different from Direct Fulfillment?
In Wholesale, Amazon buys the inventory and you ship to its fulfillment center. In Direct Fulfillment, Amazon places dropship orders and you ship straight to the end customer. Different transaction flow, different routing rules.
Why do our 856 ASNs keep getting rejected?
Almost always a mismatch between the carrier or pack structure on the ASN and what Amazon's fulfillment center actually expects. We trace it to the exact field rather than guessing.
Can this run alongside Direct Fulfillment on the same account?
Yes. We build them as separate integrations because the rules genuinely differ, even on one Vendor Central account.
Do you handle chargebacks from invoice mismatches?
We build the 810 from the same data as the 856 specifically to prevent the substitution-without-a-record pattern that causes most chargebacks.
Where this connects.
Getting 856 rejections on Wholesale orders?
Tell us what the rejection says and we will tell you whether it is a carrier, pack structure or routing mismatch before you resend anything.