Every project here started with a mainframe that would not retire and a corporate network that needed its data. We built the API bridges in between.
Heirapi is an Australian integration firm that builds secure API bridges between modern corporate networks and legacy mainframe architectures. We work with enterprises that run critical operations on older systems and need those systems to talk to new cloud services without exposing data or breaking daily workflows.
Our team comes from mainframe operations and network security. We have spent years inside the systems we now connect, so we know where the fragile points sit before we write a single endpoint.
Technical backgroundMost of our clients run logistics, manufacturing, utilities, or government-adjacent services. Their mainframes handle inventory, dispatch, asset records, and compliance logs. The bridge has to hold up under audit and peak load, not just in a demo.
Who we serveWe design each bridge around the actual protocol, data model, and transaction rules of the legacy system. Off-the-shelf adapters rarely survive contact with a real mainframe. Our approach starts with mapping what the old system expects and what the new one needs.
How we workWe tell clients when a legacy system cannot do something, when a data field is unreliable, and when a migration makes more sense than another bridge. That honesty saves months of rework and keeps the integration honest.
Communication styleEvery bridge we deliver comes with protocol notes, error-handling guides, and runbooks for the operations team. We do not vanish after go-live. The handover is part of the engagement, not an afterthought.
Delivery standardOur API layers are built so your own engineers can extend them. We use standard authentication patterns, clear logging, and versioned endpoints. When the next system needs connecting, the bridge does not have to be rebuilt from scratch.
What stays behindA timeline of the decisions that shaped how we build legacy bridges.