# @backstage/backend-plugin-api **This package is EXPERIMENTAL, but we encourage use of it to add support for the new backend system in your own plugins** This package provides the core API used by Backstage backend plugins and modules. ## Installation Add the library to your backend plugin or module package: ```bash # From your Backstage root directory yarn add --cwd plugins/-backend @backstage/backend-plugin-api ``` ## Documentation - [Backstage Readme](https://github.com/backstage/backstage/blob/master/README.md) - [Backstage Documentation](https://backstage.io/docs) - [Backstage Backend System](https://backstage.io/docs/backend-system/)