Walmart EDI Integration
Walmart runs its own EDI program with its own transaction set requirements, routing guide, and compliance penalties for late or incorrect shipments. We map Walmart's 850, 855, 856 and 810 directly inside your ERP, the same direct-connection approach we use for every trading partner, so a Walmart-specific rule change is a code change you control.
+ RULES
The scope, and what has to get right.
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850Purchase order. Walmart's PO format and item-mapping conventions, brought into your ERP as a real order against your own SKUs. -
855Acknowledgment. Confirmed quantity, cost and ship date, matched to Walmart's own compliance windows. -
856Advance ship notice. Walmart's routing guide governs carrier and appointment requirements closely, and a mismatch here is a common source of chargebacks. -
810Invoice. Matched against the ASN, the same discipline that prevents chargebacks across any retailer's EDI program.
Inside the system, not bolted on.
Walmart's routing guide, mapped once
Compliance requirements specific to Walmart are built into the mapping logic directly, rather than handled ad hoc per shipment.
Direct connection, no middleware
The same AS2 or SFTP approach used across our EDI work, so there is no per-document fee specific to Walmart traffic.
Shared infrastructure with your other trading partners
Walmart's transaction sets sit in the same ERP-based EDI system as Amazon or any other partner, not a separate tool to maintain.
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.
Is Walmart EDI different from Amazon EDI?
The underlying ANSI X12 standard is the same, but Walmart's routing guide, compliance windows and specific requirements differ from Amazon's. We map each partner's actual requirements rather than assuming they are interchangeable.
What are Walmart compliance chargebacks, and can they be prevented?
Walmart penalizes late shipments, ASN mismatches and other compliance failures. Building the mapping directly inside your ERP, with the same data driving the ASN and invoice, removes the most common causes.
Can we add Walmart alongside an existing Amazon EDI setup?
Yes. Each trading partner is mapped as its own integration inside the same ERP-based EDI system, so adding Walmart does not touch what already works for Amazon.
Do you handle Walmart's specific routing guide updates?
Yes. Because the mapping lives in your own codebase, a routing guide change is a code change your team owns, not a wait for a middleware vendor to update a template.
Where this connects.
Are Walmart chargebacks eating into margin?
Tell us which compliance requirement keeps tripping the ASN or invoice and we will tell you what is actually causing it.