Amazon Vendor Central and GXO
Integration Agency & Consultants
Reliance on manual data handling for Amazon Vendor Central becomes an operational hazard as purchase order volumes scale. When GXO does not receive order data promptly, or fulfilment confirmations lag, the resulting stockouts and shipping delays lead to marketplace penalties and vendor score degradation. We focus on the integrity of the data flow between Vendor Central and GXO to ensure shipments meet marketplace windows and inventory levels stay accurate.
Scoping your Vendor Central and GXO workflow
We connect your Amazon Vendor Central and GXO integrations with Marketplaces and WMS/3PL platforms, ensuring your systems work together efficiently. Our consulting services are invaluable, as our system audit uncovers inefficiencies and integration gaps across Amazon Vendor Central, GXO, Marketplaces, and WMS/3PL. This enables our consultants and your team to take decisive action, helping your technology ecosystem run smoothly and efficiently, so you can deliver a great experience to your customers.
Solution Design
The design for this integration focuses on the reliable movement of Purchase Orders and shipping notices between Amazon Vendor Central and GXO. Amazon serves as the source of truth for orders, while GXO manages the inventory levels. We typically configure inventory to sync on a defined schedule, balancing high accuracy with system stability. One key design decision is to prioritise the speed of shipping notifications back to Amazon to ensure delivery window compliance. While this prioritises operational performance over immediate financial reporting, it protects the vendor rating. This methodology ensures that the operations team can meet marketplace expectations while providing the finance team with the data needed for regular reconciliation.
Synchronising order data and stock levels
The integration creates a structured flow between Amazon Vendor Central and GXO. Purchase Orders from Amazon are routed to GXO to initiate fulfilment processes. After the warehouse completes the shipment, the integration captures the tracking details and sends them back to Amazon to satisfy fulfilment requirements. Stock levels in GXO are regularly synchronised with Amazon to maintain accurate availability. Monitoring is built into the workflow to identify data errors or transmission failures early. This approach ensures that fulfilment teams and marketplace managers are working from a single, consistent set of order and inventory data.
Secure orchestration on accredited platforms
Leveraging IPaaS with ISO 27001 and SOC 2 and above security accreditations enables secure, efficient integration between Amazon Vendor Central, GXO, Marketplaces, and WMS/3PL systems. This approach simplifies connecting Amazon Vendor Central and GXO with Marketplaces and WMS/3PL, ensuring data integrity and compliance. IPaaS platforms provide centralised management, robust automation, and scalability, making integrations more reliable and secure for complex supply chain and eCommerce operations.
Monitoring data health to prevent penalties
Standard reporting often fails to highlight the specific data gaps that lead to marketplace penalties. A shipment may be dispatched on time, but if the notification is delayed in reaching Amazon, it can appear as a late delivery. True visibility involves monitoring the movement of data between Amazon Vendor Central and GXO at every step. This allows for the early detection of issues like SKU mismatches or failed order transmissions. Identifying these exceptions early prevents them from compounding into larger operational problems or financial penalties. This provides the operations team with the clarity needed to maintain fulfilment standards without relying on Amazon’s own reporting.
Practical handover for ops and finance
Training focuses on enabling the operations and finance teams to manage the new workflows. The handover process covers how to monitor order movement and how to respond to common alerts, such as data mapping errors or delivery notification failures. We provide operational documentation that details the daily and weekly checks required to maintain system health. This material is designed as a practical reference for business users rather than a technical manual. By defining clear ownership for different types of exceptions, teams can resolve issues efficiently and maintain the integrity of the data between Amazon and the warehouse.
Ongoing governance of your fulfilment data
Support is focused on maintaining the operational health of the data flow between Amazon and GXO. We monitor the integration for technical failures and data inconsistencies that could disrupt fulfilment. When an error occurs, such as a rejected shipment notice or a stuck order, we provide the necessary guidance to resolve the issue quickly. This ongoing monitoring ensures the integration remains reliable as your order volumes change or as system requirements evolve, protecting your fulfilment performance over the long term.
Common failures
Inventory latency and overselling
Operational impact: Amazon's listed inventory does not reflect the stock position at GXO, leading to Purchase Orders that cannot be fulfilled. This results in direct financial penalties from Amazon for non-compliance and damages the vendor scorecard. It forces merchandising teams to maintain excessively high stock buffers, tying up cash and leading to missed sales opportunities on available SKUs.
Prevention / Action: The integration's design must treat GXO's warehouse management system as the absolute source of truth for inventory. Inventory updates from GXO must be processed via a managed queue to ensure sequential and accurate posting. This data should feed a consolidated inventory view that is synchronised with Amazon on a frequent, scheduled basis, with monitoring to alert operations teams to any significant delays.
Rejected Advanced Shipping Notices (ASNs)
Operational impact: Amazon's EDI standards are rigid. If GXO's dispatch confirmation is missing key data like SSCC pallet codes, the corresponding ASN (EDI 856 message) will be rejected. A failed ASN can lead to refused deliveries at Amazon's fulfilment centres, chargeback penalties, and a negative impact on the vendor's performance rating, delaying payment for the goods.
Prevention / Action: The integration logic must validate GXO's dispatch data against Amazon's mandatory ASN requirements before transmission. Define a clear data map for all required fields, including carrier and tracking information. Any dispatch advice from GXO that fails this validation must be automatically quarantined for review by an operations team member, preventing the transmission of a faulty ASN.
Mishandling of partial shipments
Operational impact: If GXO fulfils an Amazon Purchase Order in part, a failure to communicate this correctly can result in the entire order being marked as a failure. This leads to penalties for short-shipping and negatively affects the vendor's fulfilment metrics, which can impact future order volumes. The finance team is then left with a complex reconciliation task, matching partial invoices to POs that are incorrectly flagged as incomplete.
Prevention / Action: The integration's order management workflow must be explicitly designed to handle partial shipment scenarios. When GXO confirms a partial dispatch, the integration must generate a partial ASN for the exact quantity shipped. The process must align with GXO's method for communicating back-ordered vs. cancelled lines, ensuring the original Amazon PO is updated to accurately reflect the fulfilment status.
Product master data misalignment
Operational impact: A mismatch between the SKU or ASIN on an Amazon Purchase Order and the item record in GXO's system will stop fulfilment. The order is held at the warehouse, creating dispatch delays that risk breaching Amazon's tight shipping windows and incurring penalties. This forces ongoing, manual intervention from operations or data management teams to resolve discrepancies on a per-order basis.
Prevention / Action: A single system must be designated the master source of truth for core product data, including SKUs, barcodes, and dimensions. New item creation and updates must propagate from this master system to both Amazon and GXO. The integration should include a pre-emptive check, validating that SKUs on an incoming Amazon PO exist in GXO's item master before the order is released for picking.
Frequently asked questions
What happens if the shipping data from GXO doesn't match Amazon's requirements?
Amazon Vendor Central will reject the Advance Shipping Notice (ASN or EDI 856) if details like carrier codes or package structures do not perfectly match the original Purchase Order. This causes costly chargeback penalties and processing delays at the Amazon fulfilment centre. A correctly configured integration validates GXO's shipment data against Amazon's rules before transmission to prevent these rejections.
How are Purchase Orders from Amazon mapped to the correct GXO warehouse?
The integration must ensure that every Amazon Purchase Order transmitted to GXO contains the correct GXO 'Facility ID' or 'Warehouse Code'. If this mapping is incorrect or missing, orders are routed to the wrong warehouse, leading to major fulfilment delays and expensive cross-shipments. This logic is critical for any business using more than one GXO location to fulfil Amazon orders.
How does this integration prevent overselling and inaccurate inventory on Amazon?
The integration automates the synchronisation of inventory levels from GXO back to Amazon Vendor Central. When GXO confirms stock has been shipped or received, the integration updates the available inventory count in Amazon almost immediately. This prevents you from accepting Purchase Orders for out-of-stock items, which is a primary cause of vendor performance penalties.
How are partial shipments from GXO communicated back to Amazon?
When GXO ships a Purchase Order in multiple consignments, the integration must generate a separate Advance Shipping Notice (ASN) for each one. A common failure is sending a single ASN for a partially shipped order, which causes Amazon's systems to reject the entire delivery. This ensures Amazon can properly reconcile each delivery against the original PO, preventing payment delays and compliance failures.
What is the first step in processing an order from Amazon Vendor Central?
The process begins when an Amazon Purchase Order (PO) is received via EDI and a Purchase Order Acknowledgement (EDI 855) is sent back to confirm acceptance. The integration then translates this PO into a valid fulfilment request for GXO. Failing to send the acknowledgement promptly can result in Amazon cancelling the order, so this first step is critical for a stable order-to-cash process.