# Set Elastic IP Billing Method - SetEIPPayMode

## Overview

Set the billing mode for Elastic IP, switching will involve payment/refund.






## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `SetEIPPayMode`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.dezai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](api/summary/regionlist) |**Yes**|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, and the sub-account must be filled in. Please refer to the [GetProjectList interface](api/summary/get_project_list). |No|
| **EIPId** | string | Elastic IP's Resource Id |**Yes**|
| **PayMode** | string | Billing Mode. Enumeration values: "Traffic", traffic billing mode; "Bandwidth", bandwidth billing mode. |**Yes**|
| **Bandwidth** | int | The target bandwidth value to be adjusted, in Mbps. The bandwidth value ranges in different regions are as follows: Traffic billing [1-200], other cases [1-800] |**Yes**|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|




## Example

### Request Example
    
```
https://api.dezai.com/?Action=SetEIPPayMode
&PayMode=Traffic
&Bandwidth=2
&Region=cn-bj2
&EIPId=eip-XXXXXXX
```

### Response Example
    
```json
{
  "Action": "SetEIPPayModeResponse",
  "Request_uuid": "903fd858-ef55-416d-9abc-XXXXXX",
  "RetCode": 0
}
```