For internal service APIs
APIScout creates a source-backed endpoint inventory for backend services that may never have public documentation but still need to be understood and tested.
router.get("/accounts",
requireAuth, handler);
src/routes/accounts.ts:18
The problem
Internal services often have limited documentation and change quickly. Teams need a dependable way to identify what each service exposes before they can coordinate integrations, ownership, or security testing.
Built for Platform teams, DevSecOps engineers, and security engineers who need to understand the implementation before they trust the documentation.
Why this happens
An internal service exposes job-retry and configuration routes. They are absent from public docs, but operators and dependent services still need their contract. Internal services are built for one team and later reused by several.
A service reachable only inside a private network still needs an inventory before a security team can include it in a test plan. Network isolation does not remove the need for ownership and authorization decisions.
Internal APIs are especially poorly served by traffic capture, because many routes are job-driven, role-protected, or invoked only during operational events.
How APIScout solves it
APIScout runs inside VS Code and reads the backend source tree locally. It turns route discovery into an inspectable inventory, then exports OpenAPI when the API needs to move into documentation, testing, or security workflows.
Open an internal service in VS Code.
Discover its implemented routes locally.
Export OpenAPI to share the service contract or begin testing.
Benefits by role
Document and explore internal service contracts without requiring public traffic or a separate documentation project.
Make cross-team dependencies easier to reason about by exporting the implemented contract instead of relying on tribal knowledge.
Private-network APIs are deliberately scoped for testing rather than assumed safe because they are not internet-facing.
In practice
Treat internal APIs as owned contracts with explicit audiences.
Internal does not mean low risk.
Regenerate the inventory when service-to-service behavior changes.
Externally observed traffic will not cover internal routes.
Use dedicated test identities when assessing privileged internal routes.
Don't share an internal service without a current, source-backed contract.
FAQ
Yes. OpenAPI is useful for service-to-service contracts, operational tooling, and testing even when the API is never public.
Yes. APIScout supplies the source-derived OpenAPI, and ApyGuard can test APIs running inside private networks.
A gateway shows what it manages. Source discovery shows what a backend implements, including routes not represented in any single gateway.
When APIScout is not enough
Source discovery does not model every network path, proxy, or service mesh policy. Combine it with deployment and gateway configuration when assessing reachable internal exposure.
How ApyGuard extends the workflow
When internal APIs need security coverage, import the generated OpenAPI into ApyGuard and test services running inside private networks.
APIScout for VS Code
Install the free, local-first extension to discover backend endpoints, inspect their source context, and export an OpenAPI baseline when the workflow needs one.
Install APIScout — Free