# CancelInstanceDowngrade

## 1. API Description

This API (CancelInstanceDowngrade) is used to the API is used to cancel downgrade order of instance specification change.

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

<mark style="color:blue;">If a PREPAID virtual machine instance generates a downgrade order to take effect in the next billing cycle, you can call the API to cancel the following scheduling change:</mark>

<mark style="color:blue;">A downgrade scheduling change in specifications.</mark>
{% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type   | Description                                                                                                                                        |
| -------------- | -------- | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------- |
| instanceId     | Yes      | String | <p>ID of the instance to be modified.</p><p>To obtain the instance ID, you can call DescribeInstances and look for instanceId in the response.</p> |

## 3. Output Parameters

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

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Cancel downgrade order of instance specification change.**

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

Request：
{
  "instanceId": "your-instance-id"
}

Response：
{
  "requestId": "T05992D0C-7E8B-4047-B0C0-780F2CD549D3",
  "response": {  
    "requestId": "T05992D0C-7E8B-4047-B0C0-780F2CD549D3"
  }
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](/api-reference/api-introduction/toolkit/api-sdk.md)，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](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code                               | Description                     |
| ---------------- | ---------------------------------------- | ------------------------------- |
| 404              | INVALID\_INSTANCE\_NOT\_FOUND            | Instance does not exist.        |
| 403              | OPERATION\_DENIED\_DOWNGRADE\_NOT\_EXIST | Downgrade order does not exist. |


---

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