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Last updated：2021-05-27 17:52:42
To call an API operation of Kingsoft Cloud Billing Center, you must create a request, add common parameters and operation-specific parameters to the request based on the API document, and send the request to the specified endpoint. The request structure is as follows:
1. Endpoints and request methods
| API operation type | Endpoint | Request method |
|---|---|---|
| Account balance operation | kingpay.api.ksyun.com | GET |
| Instance service operations | trade.api.ksyun.com | POST |
| Bill operations | bill-union.api.ksyun.com | GET |
| Pay-As-You-Go bill operations | krtpay.api.ksyun.com | GET |
| Postpaid bill operations | bill.api.ksyun.com | GET |
Note: If the GET method is used, all request parameters must be URL-encoded.
2. Communication protocol
You can send a request over HTTP or HTTPS. We recommend that you use HTTPS for higher security.
3. Request parameters
The request contains common request parameters and operation-specific request parameters. The common request parameters are required for all API operations. For more information, see Common parameters. The operation-specific request parameters vary with API operations. For more information, see the "Request parameters" section for each API operation.
The following table describes the Service and Region parameters required for constructing common parameters.
| API operation type | Service | Region |
|---|---|---|
| Account balance operation | kingpay | cn-beijing-6 |
| Instance service operations | trade | cn-beijing-6 |
| Bill operations | bill-union | cn-beijing-6 |
| Pay-As-You-Go bill operations | krtpay | cn-beijing-6 |
| Postpaid bill operations | bill | cn-beijing-6 |
4. Character encoding
The requests and responses are encoded by using UTF-8 character sets.
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