---
lang: en
title: 'API docs: rest.restserver.addopenapispecendpoint'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/rest
permalink: /doc/en/lb4/apidocs.rest.restserver.addopenapispecendpoint.html
---

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[Home](./index.md) &gt; [@loopback/rest](./rest.md) &gt; [RestServer](./rest.restserver.md) &gt; [addOpenApiSpecEndpoint](./rest.restserver.addopenapispecendpoint.md)

## RestServer.addOpenApiSpecEndpoint() method

Add a new non-controller endpoint hosting a form of the OpenAPI spec.

**Signature:**

```typescript
addOpenApiSpecEndpoint(path: string, form: OpenApiSpecForm, router?: express.Router): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  path | string | Path at which to host the copy of the OpenAPI |
|  form | [OpenApiSpecForm](./rest.openapispecform.md) | Form that should be rendered from that path |
|  router | express.Router | _(Optional)_ |

**Returns:**

void