---
lang: en
title: 'API docs: extension-health.healthbindings.health_checker'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.extension-health.healthbindings.health_checker.html
---

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[Home](./index.md) &gt; [@loopback/extension-health](./extension-health.md) &gt; [HealthBindings](./extension-health.healthbindings.md) &gt; [HEALTH\_CHECKER](./extension-health.healthbindings.health_checker.md)

## HealthBindings.HEALTH\_CHECKER variable

<b>Signature:</b>

```typescript
HEALTH_CHECKER: BindingKey<HealthChecker>
```