Advance
Build the next thing on interfaces you have tested.
Modernization, new integrations and AI agents all need a dependable interface to the software you already have. Foundry reconstructs it, tests it, and keeps it current as the system changes.
Tell us about your system- TestedLook up an orderGET /orders/{id}Allowed
- TestedResend the confirmation emailPOST /orders/{id}/notifyAllowed
- TestedRefund up to a limitPOST /refunds · amount capped in the interfaceNeeds approval
- TestedCancel an orderAlso releases inventory. Side effect confirmedNeeds approval
- OpenChange address after dispatchBehavior differs by carrier. Not yet testedDenied
- ObservedExport the customer listUndocumented endpoint, found during analysisDenied
You recognize this when.
You need an API where there is none.
The system was never meant to be called by anything but its own screens or a nightly job.
An agent needs to use it, within limits.
Before an agent acts on a system, you need to know what it can do there and set the limits in the interface, not in a prompt.
Modernization has to keep the business logic.
The rules that matter live in the old system. Replacing it means proving the new one behaves the same where it counts.
What you end up with.
Artifacts your engineers can use the same day. Each finding carries its evidence state. How we work.
Reconstruct APIs
Rebuild an accurate interface specification from how a system really responds, not from what the docs claim.
Delivered as: OpenAPI specification
Generate SDKs and integration clients
Typed client code for systems you need to integrate with, shipped with tests that prove it matches.
Delivered as: SDK · conformance tests
Make systems agent-ready
Map what a system lets an AI agent do, and give agents tested interfaces with limits you set.
Delivered as: Capability map · tested interfaces
Watch for change
Re-analyze when a system or dependency changes, flag what moved and re-test what you rely on.
Delivered as: Change reports · compatibility checks
Who usually asks.
AI agent builders
Build agent workflows on interfaces you can understand and test.
Engineers
Understand the behavior before you rebuild the interface.
Engineering leaders
Make critical engineering decisions with fewer unknowns.
Read more.
How to preserve business behavior during modernization
How to find the behavior a legacy system's users depend on, decide what must survive a rewrite or migration, and prove afterwards that it did.
What to establish before connecting an AI agent to a sensitive system
The facts, boundaries and tests to have in place before an AI agent is allowed to act on a system that matters.
Wrap, replace, or modernize? Deciding what to do with a legacy interface
A decision framework for legacy interfaces: when to put a facade in front, when to rebuild, and when to change the interface itself.