# Developer

Key resources in this section include:

* [Directory of API Methods](https://documentation.dnanexus.com/developer/api/api-directory)
* [Index of `dx` commands](https://documentation.dnanexus.com/user/helpstrings-of-sdk-command-line-utilities)
* [`dxapp.json` / app metadata](https://documentation.dnanexus.com/developer/apps/app-metadata)
* [`dxworkflow.json` / workflow metadata](https://documentation.dnanexus.com/developer/workflows/workflow-metadata)
* [Client Libraries (SDK)](https://documentation.dnanexus.com/developer/client-libraries)