IBM i · Integration
IBM i & AS400 Integration Services
Make your IBM i a real-time participant in a modern architecture. SIS connects AS400 systems of record to cloud platforms, warehouse systems, eCommerce, and SaaS applications, without replacing what already works.
- REST APIs and message queues
- Azure, AWS, and Google Cloud
- WMS, OMS, ERP, and eCommerce
The fastest modernization win is usually integration.
Most IBM i environments still exchange data through nightly batch jobs, FTP drops, and custom file formats that only a few people understand. That worked when the AS400 was the only system that mattered. Today the same data has to flow in real time to eCommerce storefronts, warehouse management systems, order management, CRM, and cloud analytics.
SIS designs integration that treats the IBM i as a first-class service: business logic and Db2 for i data exposed through RESTful APIs, events published to message queues, and well-documented interfaces that other teams can build on. The core system stays stable while everything around it gets faster.
Because we also run a warehouse strategy practice, we have unusual depth in one of the most common and most fragile integrations: IBM i based ERP and merchandising systems feeding a modern WMS and automation.
Integration problems we solve most often.
Batch is too slow
Inventory, orders, and pricing update overnight, but customers and warehouses need them now.
Brittle point-to-point interfaces
Each new application needs another custom file transfer, and failures are discovered by users.
A new WMS or OMS is coming
The project plan assumes interfaces to the IBM i that nobody has designed yet.
Cloud strategy skips the AS400
Leadership wants a cloud-first architecture, and the system of record is not part of the plan.
eCommerce out of sync
Online inventory and order status lag what the IBM i knows, causing oversells and service calls.
Integration knowledge is in one head
The person who built the interfaces is the only one who can troubleshoot them.
Integration built for real-time, and built to last.
Integration architecture
A target design for how the IBM i exchanges data with every major system, including patterns, security, and monitoring.
RESTful APIs on IBM i
Business logic and data exposed as secure, documented APIs that cloud and web applications can call directly.
Event and message queue integration
Publish-and-subscribe interfaces for orders, inventory, and shipments that replace fragile batch transfers.
Cloud platform connectivity
Hybrid and multi-cloud integration with Azure, AWS, and Google Cloud services.
WMS, OMS, and eCommerce interfaces
Designed and tested interfaces between IBM i ERP or merchandising systems and warehouse, order, and storefront platforms.
Monitoring and documentation
Alerting, error handling, and runbooks so interfaces are supportable by more than one person.
How an integration engagement runs.
- 01
Map
Document every current interface, data flow, and dependency, including the undocumented ones.
- 02
Design
Define the target integration architecture and the order in which interfaces should move.
- 03
Build
Develop APIs and message-based interfaces, then test them end to end with real volumes.
- 04
Operate
Cut over safely, monitor, and hand off documentation and runbooks to your team.
Modernizing a 20-year retail platform while preserving business continuity
$5B global fashion retailer. Upgrading core merchandise and financial stock ledger from Island Pacific v1.5 (2001) to v19.1, without touching high-volume sales or merchandise processing.
Upgrading a 20-year-old IBM i merchandising platform meant preserving every downstream interface to sales, merchandising, and finance. The program finished with zero impact on sales processing.
Read the case study- Sales disruption
- 0Sales disruption
- Custom objects updated
- 1,280Custom objects updated
- Future upgrade cost cut
- ~30%Future upgrade cost cut
Integration partners who know both sides.
IBM i depth
RPG, Db2 for i, and decades of IBM i experience mean we understand the system being integrated, not just the API layer.
Warehouse and retail context
We know what WMS, OMS, and store systems need from the system of record, because we implement them.
Built to be supported
Documented, monitored interfaces your team can own, not another black box.
Headquartered in the Columbus, Ohio metro and working on-site with clients across the United States. Where we work
IBM i integration questions
Can an AS400 connect to cloud applications?
Yes. IBM i supports modern integration patterns, including RESTful web services, message queues, and database connectivity. With the right architecture, an AS400 system can exchange data in real time with cloud platforms such as Azure, AWS, and Google Cloud and with SaaS applications.
How do you build REST APIs on IBM i?
IBM i can host web services that wrap existing RPG programs and Db2 for i data, or an integration layer can call them. We choose the approach based on performance, security, and how your team will maintain it, then document and monitor each API.
Can you integrate our AS400 ERP with a new warehouse management system?
Yes. This is one of our most common projects. We design and test the order, inventory, receipt, and shipment interfaces between IBM i based ERP or merchandising systems and modern WMS platforms, including Infor WMS and Manhattan.
Do we have to replace batch integrations all at once?
No. We prioritize the interfaces where latency or fragility costs the most, move them first, and leave stable batch processes in place until there is a reason to change them.
Connect your IBM i to everything else.
Tell us which systems need to talk to your AS400 and what is breaking today. A senior SIS IBM i consultant will follow up within one business day.