# ModifyInstancesAttribute

## 1. API Description

The API is used to modify the attributes of one or more instances. Only the instance name to be displayed can be modified for now.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

* <mark style="color:blue;">Batch operations are supported. Each request can modify up to 100 instances.</mark>
* <mark style="color:blue;">If any of the instance IDs does not exist, the operation will fail immediately.</mark>
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type            | Description                                                                                                                                                                                                                                        |
| -------------- | -------- | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| instanceIds    | Yes      | Array of String | <p>Instance ID(s).</p><p>To obtain the instance IDs, you can call <a href="describeinstances"><code>DescribeInstances</code></a> and look for <code>instanceId</code> in the response. The maximum number of instances in each request is 100.</p> |
| instanceName   | Yes      | String          | <p>Instance name to be displayed.</p><p>This parameter can contain up to 64 characters. Only letters, numbers, - and periods (.) are supported.</p>                                                                                                |

## 3. Output Parameters

| Parameter Name | Type   | Description                                                                                              |
| -------------- | ------ | -------------------------------------------------------------------------------------------------------- |
| requestId      | String | The unique request ID, which is returned for each request. RequestId is required for locating a problem. |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Modify two instance to the name:** `myInstanceName`

```json
POST /api/v2/bmc HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: ModifyInstancesAttribute
<Common Request Params>

Request:
{
  "instanceIds": [
    "instanceId1",
    "instanceId2"
  ],
  "instanceName": "myInstanceName"
}

Response:
{
  "requestId": "TC1748D3E-452D-4F74-8485-7AA73718E453",
  "response": {
    "requestId": "TC1748D3E-452D-4F74-8485-7AA73718E453"
  }
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](https://docs.console.zenlayer.com/api-reference/api-introduction/toolkit/api-sdk) to make it easier for you to call APIs. More programming languages will be supported.

## 6. Error Codes

The following only lists the error codes related to the API business logic. For other error codes, see [Common Error Codes](https://docs.console.zenlayer.com/api-reference/api-introduction/instruction/commonerrorcode).​

| HTTP Status Code | Error Code                    | Description              |
| ---------------- | ----------------------------- | ------------------------ |
| 404              | INVALID\_INSTANCE\_NOT\_FOUND | Instance does not exist. |