Amazon Vendor Central and Scend
Integration Agency & Consultants
Operational tension between Amazon Vendor Central and Scend usually surfaces when sales volume outstrips manual inventory updates. When inventory levels in Scend do not mirror what Amazon believes is available, the result is overselling and cancelled orders. At scale, the gap between a warehouse pick and an Amazon status update becomes an operational bottleneck. This integration connects purchase orders and fulfilment status between systems to remove manual intervention. It is designed for teams that need to eliminate the stock mismatches and delayed shipping notices that often lead to performance penalties on Amazon.
Auditing inventory gaps and system bottlenecks
We connect your Amazon Vendor Central and Scend integrations quickly, supporting Marketplaces and WMS/3PL connections for efficient operations. Our consulting services are valuable because our system audit identifies inefficiencies and integration gaps across Amazon Vendor Central, Scend, Marketplaces, and WMS/3PL. This enables our consultants and your team to take decisive action, ensuring your technology ecosystem runs smoothly and efficiently. As a result, you can deliver a consistently excellent experience to your customers.
Solution Design
Design decisions for Amazon Vendor Central and Scend focus on protecting vendor performance metrics. In many implementations, Scend acts as the inventory master, pushing updated available stock counts to Vendor Central. We typically choose batched inventory updates over real-time triggers. This is a deliberate trade-off: while real-time sync appears ideal, it can increase system fragility during peak periods. Managed intervals provide a more stable environment for protecting against overselling and cancelled orders. Purchase orders flow from Amazon to Scend for fulfilment, with shipping notices prioritised to meet strict delivery windows. This design ensures warehouse teams work from a reliable pick list while finance can reconcile fulfilment records against Amazon data. This ensures the operating model remains grounded in actual warehouse capacity.
Synchronising stock levels and purchase orders
The integration treats Scend as the source of truth for stock, pushing inventory levels to Amazon Vendor Central on a defined schedule to prevent overselling. When Amazon issues a Purchase Order, the order details flow into Scend to initiate fulfilment. Data mapping ensures that only ready-for-dispatch stock in Scend is reflected on Amazon, protecting against orders for unavailable items. Once the warehouse confirms the shipment, shipping notifications and tracking details flow back to Amazon. This sequencing is necessary to meet delivery windows and avoid performance penalties. Monitoring is included to surface sync errors or data mismatches before they lead to late shipments or cancelled orders.
Securing high volume data with IPaaS
Leveraging IPaaS with ISO 27001 and SOC 2 and above security accreditations enables secure, efficient integration between Amazon Vendor Central, Scend, Marketplaces, and WMS/3PL systems. This approach simplifies connecting Amazon Vendor Central and Scend to Marketplaces and WMS/3PL, ensuring data integrity and compliance. IPaaS platforms provide centralised management, automation, and robust security, making integrations reliable and scalable for complex business needs.
Surfacing sync exceptions and data drift
Dashboards alone cannot prevent vendor penalties if the underlying data is drifting between systems. We provide visibility into failures, such as when an order is fulfilled in Scend but fails to update in Vendor Central, or when an inventory sync halts. Our approach detects these gaps early, surfacing exceptions before they lead to cancelled orders. Instead of checking systems manually, your team is alerted to specific operational issues. This monitoring ensures that Amazon’s demand does not overwhelm your warehouse processes, providing a clear view of fulfilment health.
Handover for operations and finance teams
Handover focuses on how operations and finance teams own the Amazon Vendor Central and Scend workflow. Operations learn to monitor inventory sync health and respond to stock mismatches that block fulfilment. Finance teams are trained on how to verify that Amazon purchase orders match the fulfilment records in Scend. We define clear ownership for exceptions, such as failed shipping notices or order errors. Documentation is provided as a practical operational reference, detailing the daily checks and periodic reconciliation tasks required to maintain accuracy. This is designed as a guide for the people running the business day to day.
Monitoring fulfilment health and resolving failures
Support at Cogent provides ongoing operational monitoring of the connection between Scend and Amazon Vendor Central. We track fulfilment flows to catch stuck orders or inventory sync failures before they lead to performance notices. We identify root causes for data failures and work with your team to resolve them. We provide a clear escalation path and regular checks to ensure the integration supports your volume as your Amazon business grows, preventing systems from becoming an operational bottleneck.
Common failures
Inventory latency and overselling
Operational impact: Amazon's Purchase Orders are based on the inventory levels you provide. If updates from Scend are slow or inaccurate, Amazon will order stock that is not available, leading to rejections and compliance chargebacks. This directly affects your vendor performance metrics and requires the fulfilment and finance teams to manage a high volume of exceptions and financial penalties.
Prevention / Action: Define Scend as the single source of truth for available-to-sell inventory. The integration must transmit stock level data on a frequent, scheduled basis, with logic that correctly differentiates between physically available stock and stock reserved for other channels. Design a robust monitoring and alerting process to notify the operations team immediately if an inventory feed fails, allowing for swift manual intervention.
Advance Shipping Notice (ASN) rejection
Operational impact: Amazon applies strict validation to EDI 856 ASN data. If carrier codes, shipping methods, or SSCC pallet information generated by Scend do not perfectly match Amazon's requirements, the ASN will be rejected. This can lead to shipments being refused at the delivery destination, significant chargeback fines, and delayed payment for goods that have already left the warehouse.
Prevention / Action: The integration must include a definitive mapping of Scend's carrier and shipping data to the corresponding Amazon-specified codes. Sequence the dispatch process so that a valid ASN is confirmed as received by Amazon before goods are physically dispatched. Incorporate validation checks into the integration layer to catch formatting and data errors prior to transmission, reducing the risk of rejection.
Unit of measure mismatch
Operational impact: A failure to correctly translate between Amazon's case pack orders and Scend's single-unit inventory records causes major fulfilment errors. For example, the warehouse may pick 10 single items instead of 10 cases, leading to incorrect shipments and substantial chargebacks. This erodes profitability and creates extensive rework for both the fulfilment and finance teams.
Prevention / Action: Maintain synchronised and accurate unit of measure data, for example 'eaches' versus 'cases', for every SKU across both Amazon Vendor Central and Scend. The integration logic must be designed to explicitly handle conversions when creating pick lists in Scend from Amazon Purchase Orders. A regular audit of product master data should be implemented to prevent configuration drift between the systems.
Frequently asked questions
Which system acts as the source of truth for inventory to prevent overselling on Amazon?
Scend is configured as the definitive source of truth for inventory. The integration ensures that available stock levels in Scend are regularly synchronised with Amazon Vendor Central. This prevents the acceptance of Purchase Orders for stock you do not have, protecting your seller performance metrics and avoiding stockout penalties.
How does the integration handle Amazon's requirements for case packs versus single units?
A common failure is misinterpreting an Amazon Purchase Order for 100 cases as 100 single units, causing major fulfilment and invoicing errors. This integration correctly maps Amazon's 'Unit of Measure' to the corresponding SKUs in Scend. This ensures that when Amazon orders a case pack, your warehouse team is instructed to pick and ship a case pack, maintaining order accuracy.
What happens if we fail to send EDI messages like Order Acknowledgements or ASNs on time?
Amazon Vendor Central's model is strict, and failing to send a timely EDI 855 Purchase Order Acknowledgement can lead to cancelled orders, while incorrect EDI 856 Advance Ship Notices (ASNs) often result in chargebacks. The integration automates the creation of these messages from events in Scend. For instance, a confirmed shipment in Scend triggers the generation of a compliant ASN, including the correct carrier codes, to be sent to Amazon.
We sell on multiple channels, not just Amazon. How is inventory allocated correctly?
In a multi-channel operation, this is a critical function to avoid overselling on one channel what has already been sold on another. The integration centralises inventory management in Scend, correctly decrementing stock levels regardless of the order source. This ensures that available inventory calculations pushed to Amazon Vendor Central accurately reflect demand from all your sales channels.
How are Amazon's Purchase Orders processed into our fulfilment system?
The integration listens for new EDI 850 Purchase Orders from Amazon Vendor Central and automatically creates the corresponding sales order in Scend. This removes the need for manual order entry, which is often a source of errors and delays. By mapping the Amazon PO directly to a Scend sales order, the entire order-to-cash process is initiated correctly from the start.