Automatically synchronize your inventory system and shop
Stock levels, prices and orders flow automatically between your inventory system and your online shop. No manual updates, no overselling, no duplicate data management. We connect JTL, Lexware, SAP, DATEV and other inventory systems securely and reliably with your shop.
50+
Integration projects
3
Sync directions
15 min
Max. sync interval
24/7
Monitoring
Anyone running an online shop alongside an inventory system knows the problem: stock levels don't match, price changes require double maintenance, and orders from the shop don't automatically reach order processing. The solution is a professional interface integration that automates all three core processes. Our integration services connect your existing inventory system bidirectionally with the shop — without media breaks and without manual intervention in day-to-day operations.
What does inventory system integration mean in practice?
An inventory system integration is more than a data export. It is a living connection between two systems that continuously exchanges data in both directions. The inventory system remains the leading system for master data, prices and stock management. The shop draws this data automatically and reports back new orders, customer data and payment confirmations. This clear separation of systems keeps control in the inventory system while ensuring a current, consistent shop catalog.
Stock synchronization
Stock levels are transferred from the inventory system to the shop at defined intervals or via real-time webhook. Reservations, incoming goods receipts and minimum stock levels are automatically included, reliably preventing overselling.
Price and condition transfer
Price lists, volume pricing, special conditions for customer groups and time-limited promotional prices are synchronized from the inventory system to the shop. Price changes in the inventory system take effect immediately in the shop without manual intervention.
Order back-transmission
New shop orders are automatically created as orders in the inventory system. Order confirmations, delivery notes and invoices flow back to the shop and keep the customer informed. The entire order lifecycle runs without manual transfer steps.
Product master data
Item numbers, names, descriptions, units, weights and variants are replicated from the inventory system as the leading system into the shop. New items appear automatically in the shop catalog; deactivated items are hidden.
Customer master data
Customer data from the shop checkout is created in the inventory system as debtor accounts or merged with existing records. Delivery addresses, payment terms and customer numbers are kept bidirectionally consistent.
Status sync and tracking
Shipping status, tracking numbers and delivery dates are fed back from the inventory system into the shop and automatically communicated to the customer. Partial deliveries, returns and credit notes are transmitted as independent events.
Which inventory systems do we connect?
Several inventory systems are particularly prevalent in the German mid-market. Our integration architecture supports all common systems via native APIs, file-based interfaces or a central middleware. For SAP systems we offer specialized SAP integrations, for DATEV the DATEV integration and for JTL warehouse management the JTL integration. We also connect Lexware, Microsoft Dynamics 365 and industry-specific custom systems via documented REST APIs or individual adapters.
- JTL-Wawi: native API integration, real-time webhooks, variants and bills of materials
- Lexware: API-based or file interface (XML/CSV), order and invoice back-transmission
- SAP Business One / S/4HANA: RFC/BAPI or REST API, multi-client support
- Microsoft Dynamics 365 Business Central: OData/REST, cloud and on-premises
- DATEV Unternehmen Online: document transfer, account assignment, GoBD-compliant
- Custom ERP systems: REST, SOAP, GraphQL or file-based on request
Your system not on the list?
Technical workflow of an inventory system integration
A professional inventory system integration follows a defined architectural principle: the inventory system remains the master for all product-related master data. An integration layer — either directly in the shop or as a standalone middleware — handles transformation, error management and routing of data. The shop is the receiving system for catalog data and the sending system for transactional data such as orders and customer data.
Analysis and mapping
We analyze your inventory system in detail: available API endpoints, data structures, field mapping and business rules. Together we define which data fields are transferred between systems and which transformation rules apply.
Particular challenges in stock synchronization
Stock synchronization is the most critical part of inventory system integration. Overselling occurs when an item is shown as available in the shop even though it is already out of stock in the inventory system. At the same time, short-term fluctuations should not cause items to be shown as unavailable unnecessarily. The right balance between timeliness and stability is a configuration question that we define together with you.
Buffers and minimum quantities
In practice, a configurable stock buffer is recommended: the shop shows only the quantity that the inventory system reports as available, minus a safety buffer. This buffer absorbs concurrency — when multiple customers add the same item to the cart simultaneously before the reservation is saved in the inventory system.
- Configurable buffer per item or item group
- Immediate update on goods receipt in the inventory system
- Multi-warehouse support: consolidate stock from multiple locations or display separately
Synchronization intervals and real time
Not every inventory system supports real-time webhooks. For systems without a push mechanism, we rely on optimized pull intervals: short intervals for stock and prices, longer ones for master data. For systems with webhook support, we process changes within seconds.
- Real-time webhooks where available (JTL, Shopware, SAP notifications)
- Configurable pull intervals (typical: 5-15 minutes for stock)
- Delta synchronization: only changed records are transferred
Price and condition sync: More than just a number
Pricing data in an inventory system is complex: customer price groups, volume tiers, time-limited promotional prices, special conditions for specific buyers and different tax rates for different countries. In B2B shops there is the additional requirement that many prices should not be publicly visible. Our integration layer maps this complexity in full and delivers the correct prices for each customer and context to the shop — in real time or from a current cache.
B2B prices without compromise
Order back-transmission: The closed loop
Order back-transmission closes the data loop: new orders from the shop automatically arrive as orders in the inventory system. Customer number, items, quantities, prices, delivery address and payment method are correctly transferred. For new customers, a debtor account is created automatically. For existing customers, the order is assigned to the existing debtor account. Order processing begins immediately — without manual import, without delay.
Equally important is the return path: when the inventory system confirms the order, creates a shipment or generates an invoice, these status changes are automatically fed back to the shop. The customer receives a shipping confirmation with tracking number, can download their invoice and sees the current delivery status in their account. This complete status loop significantly reduces support requests. Talk to us about your scenario.
Scope: what the integration covers and what it does not
An inventory system integration is not an ERP implementation project and not a new shop development. It connects existing systems through an integration layer and automates data flows that previously happened manually or not at all. The following points clearly define the scope to set realistic expectations.
Included in scope
Automated stock synchronization, price transfer, order back-transmission, status updates, customer master data reconciliation, error logging and monitoring. Configuration of all synchronization rules and intervals to your requirements.
Configurable on request
Multi-warehouse stock consolidation, customer-specific price lists, marketplace integration via the same integration layer, DATEV accounting transfer and extension with additional data flows after go-live.
Not in scope
Implementation or customization of the inventory system itself, online shop development, SEO optimization of the shop catalog or strategic e-commerce consulting beyond the integration topic. We provide these services on request as separate projects.
Maintenance, monitoring and long-term operations
An inventory system integration is not a one-time implementation but a permanent connection that must be maintained and evolved. Inventory system updates, shop updates and changing business processes all affect the interface. Our maintenance packages include proactive monitoring of all synchronization processes, adaptation to API changes in both systems and quarterly reviews of data quality. This keeps your integration stable even when one of the connected systems changes.
Monitoring as a safety net
Frequently asked questions about inventory system integration
Our integration projects always start with a thorough analysis of your existing system landscape. This includes the inventory system, the online shop and all other systems to be included in the data flows — from DATEV accounting to marketplace integration. On this basis, we develop an integration architecture that works today and also supports future extensions. Get in touch — we will give you a well-founded assessment of your specific starting position.