# DescribeDomainSpeedLimit

## 1. API Description

This interface is used to query the speed limit configuration of an accelerated domain name.

## 2. Request Parameters

The following request parameter list includes only the necessary parameters for the interface

| Parameter Name | Required | Type   | Description           |
| -------------- | -------- | ------ | --------------------- |
| domainId       | Yes      | String | Accelerated domain Id |

## 3. Output Parameters

| Parameter Name | Type                                                                            | Description                                                                                 |
| -------------- | ------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |
| requestId      | String                                                                          | Unique request ID, returned with each request. Provide this requestId when locating issues. |
| speedLimit     | [SpeedLimitInfo](/api-reference/networking/cdn/datastructure.md#speedlimitinfo) | Speed limit configuration                                                                   |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}

1. **Query the speed limit configuration of the accelerated domain**

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

Request:
{
    "domainId": "domainIdxxxxx"
}


Response:
{
    "requestId": "T6883FCD0-3E7D-44EA-A517-A421A52A27F4",
    "response": {
        "requestId": "T6883FCD0-3E7D-44EA-A517-A421A52A27F4",
        "speedLimit": {
            "enable": true,
            "limit": 20971520
        }
    }
}
```

{% endtab %}
{% endtabs %}

## 5. Error Codes

The following includes error codes encountered in 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\_DOMAIN\_NOT\_FOUND        | The specified accelerated domain does not exist.                  |
| 403              | DOMAIN\_OPERATION\_NO\_PERMISSION  | Operation denied due to lack of permission.                       |
| 400              | INVALID\_SPEED\_LIMIT\_SIZE\_EMPTY | When enabling rate limiting, the rate limit size cannot be empty. |


---

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