Clarus WMS connects directly to OnBuy so operations teams can manage orders, stock and despatch from one place. Once connected, OnBuy sales orders pass into Clarus, you allocate by quantity in the WMS, and shipment confirmations with tracking flow back to OnBuy. Inventory availability is kept in sync so listings remain accurate. Label data and sales order line information are shared between systems to keep packing and customer updates consistent. No third-party middleware or coding is required.
What are WMS integrations with OnBuy and how does Clarus support them?
A WMS integration with OnBuy links your marketplace storefront to the warehouse processes that control fulfilment. The model is simple, orders in, allocation and fulfilment in the WMS, then tracking and stock updates out.
Clarus WMS supports this model in a dependable way:
- Sales order pass-through from OnBuy to Clarus
New OnBuy orders are imported into Clarus with order headers, buyer and delivery details, and line items with quantities, ready for allocation. - Allocate by quantity in Clarus
Teams allocate stock at order or line level before picking begins so commitments are explicit and controlled. - Label data and sales order line information shared
Clarus keeps the label fields and line-level context needed for accurate printing and clean confirmations. - Orders, tracking and inventory kept in sync
On despatch, Clarus posts shipment confirmations with tracking to OnBuy and updates available inventory.
The outcome is a WMS-led workflow that aligns marketplace activity with warehouse reality.
How does Clarus manage order and inventory syncing with OnBuy?
Clarus focuses on the essential data paths for predictable operations.
Inbound to Clarus WMS
- OnBuy sales orders arrive with buyer details, delivery addresses and line items with quantities.
- Order status visibility lets teams see new, in progress and completed orders in one place.
Within Clarus WMS
- Allocation by quantity reserves the items you intend to ship and provides supervisors and pick teams with a clear view of commitments.
- Picking and packing follow your configured workflows, including scanner confirmations where used.
- Label generation uses the shared label data so documents and carrier labels match parcel contents.
Outbound back to OnBuy
- Shipment confirmations including tracking numbers are posted when you despatch.
- Inventory updates adjust available stock following picks, receipts and adjustments.
- Line-level fidelity is preserved so what you ship is what OnBuy records.
Is any development work needed to set up WMS integrations with OnBuy?
No. The OnBuy connection is provided natively in Clarus WMS. You authorise Clarus with your OnBuy account, confirm permissions for order import and stock export, then select a small set of operational preferences. There is no middleware to host and no custom scripts to maintain for a standard deployment.
What’s the fastest way to connect Clarus WMS to OnBuy?
Setup is intentionally straightforward:
- Connect your OnBuy account to Clarus
Authorise Clarus WMS with your OnBuy credentials and confirm the required scopes. - Orders, tracking and inventory begin syncing
New OnBuy orders appear in Clarus. When you confirm shipments, tracking and confirmations post to OnBuy, and inventory updates follow. - Manage everything from one dashboard
Allocate by quantity, run picks, print labels and confirm despatch in Clarus. Monitor orders and stock across channels in one place.
No third-party middleware or coding is required.
How does WMS allocation by quantity help with OnBuy fulfilment?
Allocation by quantity provides precise control before work starts on the floor.
- Prioritise orders by promised date or service.
- Reserve partial quantities when only part of a line is available, then complete the balance later.
- Avoid double allocation by making commitments explicit in the WMS.
Allocation states are visible to supervisors and pick teams so everyone understands what is committed and what remains open.
How are labels, tracking and shipment updates handled for OnBuy?
Labels and tracking are central to a clean buyer experience.
- Label data available where needed
Clarus stores the label fields required for accurate printing and reconciliation. - Tracking returned to OnBuy
When you despatch, Clarus posts the tracking reference and carrier details with the shipment confirmation. - Line-level accuracy
Confirmations match the items actually packed, which supports clear customer communications and accurate reporting.
What operational visibility does Clarus WMS provide for OnBuy?
The integration gives operations leaders the views they use day to day:
- Unified order board for new, allocated, picking and shipped OnBuy orders.
- Stock views showing available, allocated and on-hand quantities to inform allocation decisions.
- Exceptions that flag orders which cannot be fully allocated so you can replan or expedite replenishment.
- Despatch and tracking reports summarising shipped orders and carrier references for customer service.
Any time saving will vary by operation, treat figures as estimates, however teams typically find it simpler to manage marketplace fulfilment from one WMS dashboard once connected.
How does inventory synchronisation work across OnBuy and other channels?
Clarus WMS treats the warehouse as the source of truth for stock on hand. When you pick and despatch, Clarus adjusts on-hand and available quantities, then posts updated availability to OnBuy. If you also connect other channels, Clarus applies the same logic to each integration to help prevent oversell events. If you operate multiple locations, Clarus can reflect location-specific stock and publish the right totals to OnBuy in line with your listing strategy.
What data is exchanged between OnBuy and Clarus WMS during the order lifecycle?
The integration concentrates on the fields warehouse and customer service teams use every day.
- From OnBuy to Clarus
Order headers, buyer and delivery details, any service selections, and line items with quantities. - Within Clarus
Allocation by quantity, pick and pack confirmations, label data fields and tracking references. - From Clarus to OnBuy
Shipment confirmations with tracking numbers, line-level fulfilment details and inventory availability updates.
By focusing on these fields, the flow remains stable and predictable.
Want a WMS that integrates directly with OnBuy?
Connect your OnBuy account to Clarus WMS, let orders, tracking and inventory sync, and manage fulfilment in one place. If you would like to see the flow end to end, request a demo and we will walk through connection, allocation by quantity, picking, labelling and despatch.
FAQs
What data syncs between Clarus WMS and OnBuy?
Clarus receives OnBuy sales orders with buyer, delivery and line-level details. Clarus returns shipment confirmations with tracking numbers and updates inventory availability. Label data and order line information are shared so labels and confirmations match what was packed.
Can I allocate inventory before sending orders?
Yes. Allocation by quantity happens in Clarus WMS. You can allocate full orders or individual line quantities before picking, which reserves stock and avoids accidental double allocation.
How often do updates sync between systems?
Orders, tracking and inventory sync once the connection is active. Shipment confirmations and tracking are posted after despatch, and inventory updates follow fulfilment events. If you need defined intervals for governance, the Clarus team can confirm the schedule for your account.
Do I need a developer to manage the integration?
No. The integration is provided natively in Clarus WMS. You connect your OnBuy account, set preferences and begin syncing. There is no third-party middleware or custom code for a standard setup.
What happens if order details change after syncing?
If an OnBuy order changes before despatch, Clarus receives the update and shows it in your dashboard. You can adjust allocation by quantity or packing as needed. When you complete the shipment in Clarus, the final status and tracking are sent back to OnBuy with the correct line-level detail.
Clarus WMS provides a clean, warehouse-first integration with OnBuy. Sales orders pass through, you allocate by quantity in the WMS, labels and tracking are handled alongside packing, and inventory stays in sync. Setup is simple, control is clear and the workflow supports day-to-day fulfilment without unnecessary complexity.