> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unbound.rip/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> The Developer API: the modules your addons build on.

Unbound exposes a set of modules for building addons: finding Discord's internals, persisting settings, localizing strings, showing toasts, and more. Together they're the **Developer API**.

Every module is published in the `@unbound-app/api` package. Import what you need by name, and if you prefer, each module is also a subpath. The whole surface mirrors the `unbound` global at runtime.

```ts theme={null}
import { metro, storage } from '@unbound-app/api';
// equivalent: import metro from '@unbound-app/api/metro';
// runtime global: unbound.metro
```

<Note>
  [Metro](/modules/metro) is the foundation. Almost everything else (assets, i18n, stores, your own addons) locates Discord's modules through it first. If you're new here, start there.
</Note>

### Modules

<CardGroup cols={2}>
  <Card title="Metro" icon="box-taped" href="/modules/metro">
    Locate the exact Discord module you need before you patch it.
  </Card>

  <Card title="Storage" icon="database" href="/modules/storage">
    Reactive, persisted settings: read, write, and re-render on change.
  </Card>

  <Card title="Assets" icon="face-smile" href="/modules/assets">
    Discover Discord's bundled images and icons by name.
  </Card>

  <Card title="Native" icon="file-code" href="/modules/native">
    Bridge to the app's native iOS and Android modules.
  </Card>

  <Card title="Toasts" icon="bells" href="/modules/toasts">
    Show transient, non-blocking notifications.
  </Card>

  <Card title="i18n" icon="globe" href="/modules/i18n">
    Localize your addon to the user's Discord language.
  </Card>

  <Card title="File System" icon="folder" href="/modules/fs">
    Read, write, and check files against the documents directory.
  </Card>

  <Card title="Managers" icon="layer-group" href="/modules/managers">
    How plugins and themes are loaded, started, and persisted.
  </Card>
</CardGroup>