## Attach Domain

`client.workers.domains.update(DomainUpdateParamsparams, RequestOptionsoptions?): DomainUpdateResponse`

**put** `/accounts/{account_id}/workers/domains`

Attaches a domain that routes traffic to a Worker.

### Parameters

- `params: DomainUpdateParams`

  - `account_id: string`

    Path param: Identifier.

  - `hostname: string`

    Body param: Hostname of the domain. Can be either the zone apex or a subdomain of the zone. Requests to this hostname will be routed to the configured Worker.

  - `service: string`

    Body param: Name of the Worker associated with the domain. Requests to the configured hostname will be routed to this Worker.

  - `environment?: string`

    Body param: Worker environment associated with the domain.

  - `zone_id?: string`

    Body param: ID of the zone containing the domain hostname.

  - `zone_name?: string`

    Body param: Name of the zone containing the domain hostname.

### Returns

- `DomainUpdateResponse`

  - `id: string`

    Immutable ID of the domain.

  - `cert_id: string`

    ID of the TLS certificate issued for the domain.

  - `environment: string`

    Worker environment associated with the domain.

  - `hostname: string`

    Hostname of the domain. Can be either the zone apex or a subdomain of the zone. Requests to this hostname will be routed to the configured Worker.

  - `service: string`

    Name of the Worker associated with the domain. Requests to the configured hostname will be routed to this Worker.

  - `zone_id: string`

    ID of the zone containing the domain hostname.

  - `zone_name: string`

    Name of the zone containing the domain hostname.

### Example

```node
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

const domain = await client.workers.domains.update({
  account_id: '023e105f4ecef8ad9ca31a8372d0c353',
  hostname: 'app.example.com',
  service: 'my-worker',
});

console.log(domain.id);
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "result": {
    "id": "dbe10b4bc17c295377eabd600e1787fd",
    "cert_id": "9fdf92c8-64c2-4a3d-b1af-e15304961145",
    "environment": "production",
    "hostname": "app.example.com",
    "service": "my-worker",
    "zone_id": "593c9c94de529bbbfaac7c53ced0447d",
    "zone_name": "example.com"
  },
  "success": true
}
```