# Backend

The ASP.NET Core API is the system boundary for persistence, authentication, business rules, files, integrations, and background work.

- [API reference](api.md)
- [Background jobs](background-jobs.md)
- [Error handling](error-handling.md)
- [Backend architecture](../architecture/backend.md)

Run and test it through [local development](../development/getting-started.md). Do not point local acceptance tests at production data.