> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api-and-sdk-en/sdk/domains-api.md).

# Domains API

functional (flat) API **Domain.Action** This is a public interface grouped in this form. You can use the functional API as is, and the domain interface additionally provides the same implementation grouped by domain.

The document structure follows this directory structure exactly — the REFERENCE.md in the domain directory is the overview, `domain/member/REFERENCE.md`is the member details.

### Domain list

| Domain                                                                          | Description                             |
| ------------------------------------------------------------------------------- | --------------------------------------- |
| [Ads](/documentation/api-and-sdk-en/sdk/domains-api/ads.md)                     | Interstitial · AdMob · banner ads       |
| [Analytics](/documentation/api-and-sdk-en/sdk/domains-api/analytics.md)         | Analytics logs · screen logging         |
| [Clipboard](/documentation/api-and-sdk-en/sdk/domains-api/clipboard.md)         | Clipboard read/write                    |
| [Device](/documentation/api-and-sdk-en/sdk/domains-api/device.md)               | Device · permissions · location · media |
| [Environment](/documentation/api-and-sdk-en/sdk/domains-api/environment.md)     | Runtime environment · version · network |
| [File](/documentation/api-and-sdk-en/sdk/domains-api/file.md)                   | File saving · PDF viewer                |
| [Game](/documentation/api-and-sdk-en/sdk/domains-api/game.md)                   | Game Center leaderboard · profile       |
| [IAP](/documentation/api-and-sdk-en/sdk/domains-api/iap.md)                     | In-app purchases                        |
| [Migration](/documentation/api-and-sdk-en/sdk/domains-api/migration.md)         | Web origin storage migration            |
| [NavigationBar](/documentation/api-and-sdk-en/sdk/domains-api/navigationbar.md) | Navigation bar buttons · appearance     |
| [Notification](/documentation/api-and-sdk-en/sdk/domains-api/notification.md)   | Notification consent                    |
| [Permissions](/documentation/api-and-sdk-en/sdk/domains-api/permissions.md)     | Query/request device permissions        |
| [Promotion](/documentation/api-and-sdk-en/sdk/domains-api/promotion.md)         | Promotion rewards · invite friends      |
| [Review](/documentation/api-and-sdk-en/sdk/domains-api/review.md)               | Request in-app reviews                  |
| [SafeArea](/documentation/api-and-sdk-en/sdk/domains-api/safearea.md)           | Query and subscribe to Safe Area insets |
| [Screen](/documentation/api-and-sdk-en/sdk/domains-api/screen.md)               | Screen control                          |
| [Share](/documentation/api-and-sdk-en/sdk/domains-api/share.md)                 | Share links · share sheet               |
| [Storage](/documentation/api-and-sdk-en/sdk/domains-api/storage.md)             | Local storage                           |
| [TossAuth](/documentation/api-and-sdk-en/sdk/domains-api/tossauth.md)           | Toss Login · signing                    |
| [TossPay](/documentation/api-and-sdk-en/sdk/domains-api/tosspay.md)             | Toss Pay payment authentication         |
| [User](/documentation/api-and-sdk-en/sdk/domains-api/user.md)                   | User key · consent data · age           |

### Relationship with the functional API

```js
// functional (flat) API — same as v2
import { getAnonymousKey } from "@apps-in-toss/web-framework";
await getAnonymousKey();

// domain interface — same implementation grouped by domain.action
import { User } from "@apps-in-toss/web-framework";
await User.getAnonymousKey();
```

If you call a domain member on an unsupported Toss app version, `it does not return`undefined and `UNSUPPORTED_APP_VERSION` throws an **error**does so (the functional API preserves the existing (v2) behavior). You can check that member `with isSupported()`in advance.


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