# DescribeCapacityReservationBillingRequests
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Describes a request to assign the billing of the unused capacity of a Capacity Reservation. For more information, see [ Billing assignment for shared Amazon EC2 Capacity Reservations](https://docs.amazonaws.cn/AWSEC2/latest/UserGuide/transfer-billing.html).

## Request Parameters
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The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **CapacityReservationId.N**   
The ID of the Capacity Reservation.  
Type: Array of strings  
Required: No

 **DryRun**   
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

 **Filter.N**   
One or more filters.  
+  `status` - The state of the request (`pending` \$1 `accepted` \$1 `rejected` \$1 `cancelled` \$1 `revoked` \$1 `expired`).
+  `requested-by` - The account ID of the Capacity Reservation owner that initiated the request. Not supported if you specify `requested-by` for **Role**.
+  `unused-reservation-billing-owner` - The ID of the consumer account to which the request was sent. Not supported if you specify `unused-reservation-billing-owner` for **Role**.
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 **MaxResults**   
The maximum number of items to return for this request. To get the next page of items, make another request with the token returned in the output. For more information, see [Pagination](https://docs.amazonaws.cn/AWSEC2/latest/APIReference/Query-Requests.html#api-pagination).  
Type: Integer  
Valid Range: Minimum value of 1. Maximum value of 1000.  
Required: No

 **NextToken**   
The token to use to retrieve the next page of results.  
Type: String  
Required: No

 **Role**   
Specify one of the following:  
+  `odcr-owner` - If you are the Capacity Reservation owner, specify this value to view requests that you have initiated. Not supported with the `requested-by` filter.
+  `unused-reservation-billing-owner` - If you are the consumer account, specify this value to view requests that have been sent to you. Not supported with the `unused-reservation-billing-owner` filter.
Type: String  
Valid Values: `odcr-owner | unused-reservation-billing-owner`   
Required: Yes

## Response Elements
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The following elements are returned by the service.

 **capacityReservationBillingRequestSet**   
Information about the request.  
Type: Array of [CapacityReservationBillingRequest](API_CapacityReservationBillingRequest.md) objects

 **nextToken**   
The token to use to retrieve the next page of results. This value is `null` when there are no more results to return.  
Type: String

 **requestId**   
The ID of the request.  
Type: String

## Errors
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For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/DescribeCapacityReservationBillingRequests) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/DescribeCapacityReservationBillingRequests)