---
title: "Interface: Extension"
description: Docker extension API reference
keywords: Docker, extensions, sdk, API, reference
aliases:
 - /desktop/extensions-sdk/dev/api/reference/interfaces/Extension/
 - /extensions/extensions-sdk/dev/api/reference/interfaces/Extension/
---

**`Since`**

0.2.0

## Properties

### vm

• `Optional` `Readonly` **vm**: [`ExtensionVM`](ExtensionVM.md)

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### host

• `Optional` `Readonly` **host**: [`ExtensionHost`](ExtensionHost.md)

___

### image

• `Readonly` **image**: `string`

**`Since`**

0.3.3