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# Extensions

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> The extensions endpoints are used by the Admin App to retrieve what extensions to install.
> [Learn more about Extensions](/concepts/extensions/).

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## List Extensions

List the available extensions in the project. The types of extensions that you can list are interfaces, displays,
layouts, modules.

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### Query Parameters

This endpoint doesn't currently support any query parameters.

### Returns

An array of interface extension keys.

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### REST API

```
GET /extensions/:type
```

##### Example

```
GET /extensions/interfaces
```

### GraphQL

```
POST /graphql/system
```

```graphql
type Query {
	extensions: extensions
}
```

##### Example

```graphql
query {
	extensions {
		interfaces
	}
}
```

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