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lang: en
title: 'API docs: core.server'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/core
permalink: /doc/en/lb4/apidocs.core.server.html
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[Home](./index.md) > [@loopback/core](./core.md) > [Server](./core.server.md)
## Server interface
Defines the requirements to implement a Server for LoopBack applications: start() : Promise<void> stop() : Promise<void> It is recommended that each Server implementation creates its own child Context, which inherits from the parent Application context. This way, any Server-specific bindings will remain local to the Server instance, and will avoid polluting its parent module scope.
<b>Signature:</b>
```typescript
export interface Server extends LifeCycleObserver
```
<b>Extends:</b> [LifeCycleObserver](./core.lifecycleobserver.md)
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [listening](./core.server.listening.md) | boolean | Tells whether the server is listening for connections or not |