# Function: createExpressMiddleware()

> 

> **createExpressMiddleware**\<`TRouter`\>(`opts`): `Handler`

Defined in: [packages/server/src/adapters/express.ts:35](https://github.com/trpc/trpc/blob/7c907acfd8b31929214792e3b8c2ad7a8ac72563/packages/server/src/adapters/express.ts#L35)

Creates an Express middleware that serves a router. Mount it on a path,
such as `/trpc`.

## Type Parameters

| Type Parameter |
| ------ |
| `TRouter` *extends* [`AnyTRPCRouter`](https://trpc.io/docs/typedoc/server/index/type-aliases/AnyTRPCRouter.md) |

## Parameters

| Parameter | Type |
| ------ | ------ |
| `opts` | [`NodeHTTPHandlerOptions`](https://trpc.io/docs/typedoc/server/adapters/node-http/type-aliases/NodeHTTPHandlerOptions.md)\<`TRouter`, `Request`\<`ParamsDictionary`, `any`, `any`, `ParsedQs`, `Record`\<`string`, `any`\>\>, `Response`\<`any`, `Record`\<`string`, `any`\>\>\> |

## Returns

`Handler`

## See

https://trpc.io/docs/server/adapters/express#3-use-the-express-adapter