> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/compute/vm/security-group/describeinstanceavailablesecuritygroupresources.md).

# DescribeInstanceAvailableSecurityGroupResources

## 1. API Description

This API (DescribeInstanceAvailableSecurityGroupResources) is used to the API is used to obtain security groups available to be applied to an instance.

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type   | Description  |
| -------------- | -------- | ------ | ------------ |
| instanceId     | Yes      | String | Instance ID. |

## 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> |
| instanceAvailableSecurityGroups | Array of [InstanceAvailableSecurityGroup](/api-reference/compute/vm/datastructure.md#instanceavailablesecuritygroup) | All available security groups.                                                                                        |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Obtain security groups available to be applied to an instance.**

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

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

Response:
{
  "requestId": "T728669AE-9EC6-463E-8728-F49DE5C2BC67",
  "response": {
    "requestId": "T728669AE-9EC6-463E-8728-F49DE5C2BC67",
    "instanceAvailableSecurityGroups": [
      {
        "securityGroupId": "your-seucurity-id-1",
        "securityGroupName": "redis-security",
        "isDefault": true
      },
      {
        "securityGroupId": "your-seucurity-id-2",
        "securityGroupName": "default-web-80-security",
        "isDefault": false
      },
      {
        "securityGroupId": "your-seucurity-id-3",
        "securityGroupName": "cluster-nginx-security",
        "isDefault": true
      }
    ]
  }
}
```

{% 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 |
| ---------------- | ---------- | ----------- |