## Update an mTLS certificate's hostname settings

**put** `/{accounts_or_zones}/{account_or_zone_id}/access/certificates/settings`

Updates an mTLS certificate's hostname settings.

### Path Parameters

- `account_id: optional string`

  The Account ID to use for this endpoint. Mutually exclusive with the Zone ID.

- `zone_id: optional string`

  The Zone ID to use for this endpoint. Mutually exclusive with the Account ID.

### Body Parameters

- `settings: array of CertificateSettings`

  - `china_network: boolean`

    Request client certificates for this hostname in China. Can only be set to true if this zone is china network enabled.

  - `client_certificate_forwarding: boolean`

    Client Certificate Forwarding is a feature that takes the client cert provided by the eyeball to the edge, and forwards it to the origin as a HTTP header to allow logging on the origin.

  - `hostname: string`

    The hostname that these settings apply to.

### Returns

- `errors: array of object { code, message, documentation_url, source }`

  - `code: number`

  - `message: string`

  - `documentation_url: optional string`

  - `source: optional object { pointer }`

    - `pointer: optional string`

- `messages: array of object { code, message, documentation_url, source }`

  - `code: number`

  - `message: string`

  - `documentation_url: optional string`

  - `source: optional object { pointer }`

    - `pointer: optional string`

- `success: true`

  Whether the API call was successful.

  - `true`

- `result: optional array of CertificateSettings`

  - `china_network: boolean`

    Request client certificates for this hostname in China. Can only be set to true if this zone is china network enabled.

  - `client_certificate_forwarding: boolean`

    Client Certificate Forwarding is a feature that takes the client cert provided by the eyeball to the edge, and forwards it to the origin as a HTTP header to allow logging on the origin.

  - `hostname: string`

    The hostname that these settings apply to.

- `result_info: optional object { count, page, per_page, 2 more }`

  - `count: optional number`

    Total number of results for the requested service.

  - `page: optional number`

    Current page within paginated list of results.

  - `per_page: optional number`

    Number of results per page of results.

  - `total_count: optional number`

    Total results available without any search parameters.

  - `total_pages: optional number`

    The number of total pages in the entire result set.

### Example

```http
curl https://api.cloudflare.com/client/v4/$ACCOUNTS_OR_ZONES/$ACCOUNT_OR_ZONE_ID/access/certificates/settings \
    -X PUT \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
    -d '{
          "settings": [
            {
              "china_network": false,
              "client_certificate_forwarding": true,
              "hostname": "admin.example.com"
            }
          ]
        }'
```

#### 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"
      }
    }
  ],
  "success": true,
  "result": [
    {
      "china_network": false,
      "client_certificate_forwarding": true,
      "hostname": "admin.example.com"
    }
  ],
  "result_info": {
    "count": 1,
    "page": 1,
    "per_page": 20,
    "total_count": 2000,
    "total_pages": 100
  }
}
```