DescribeReservedInstances - Amazon OpenSearch Service


Describes the Amazon OpenSearch Service instances that you have reserved in a given Region. For more information, see Reserved Instances in Amazon OpenSearch Service.

Request Syntax

GET /2021-01-01/opensearch/reservedInstances?maxResults=MaxResults&nextToken=NextToken&reservationId=ReservedInstanceId HTTP/1.1

URI Request Parameters

The request uses the following URI parameters.


An optional parameter that specifies the maximum number of results to return. You can use nextToken to get the next page of results.

Valid Range: Maximum value of 100.


If your initial DescribeReservedInstances operation returns a nextToken, you can include the returned nextToken in subsequent DescribeReservedInstances operations, which returns results in the next page.


The reserved instance identifier filter value. Use this parameter to show only the reservation that matches the specified reserved OpenSearch instance ID.

Length Constraints: Fixed length of 36.

Pattern: \p{XDigit}{8}-\p{XDigit}{4}-\p{XDigit}{4}-\p{XDigit}{4}-\p{XDigit}{12}

Request Body

The request does not have a request body.

Response Syntax

HTTP/1.1 200 Content-type: application/json { "NextToken": "string", "ReservedInstances": [ { "BillingSubscriptionId": number, "CurrencyCode": "string", "Duration": number, "FixedPrice": number, "InstanceCount": number, "InstanceType": "string", "PaymentOption": "string", "RecurringCharges": [ { "RecurringChargeAmount": number, "RecurringChargeFrequency": "string" } ], "ReservationName": "string", "ReservedInstanceId": "string", "ReservedInstanceOfferingId": "string", "StartTime": number, "State": "string", "UsagePrice": number } ] }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


When nextToken is returned, there are more results available. The value of nextToken is a unique pagination token for each page. Send the request again using the returned token to retrieve the next page.

Type: String


List of Reserved Instances in the current Region.

Type: Array of ReservedInstance objects


For information about the errors that are common to all actions, see Common Errors.


An error occured because the client wanted to access an unsupported operation.

HTTP Status Code: 409


Request processing failed because of an unknown error, exception, or internal failure.

HTTP Status Code: 500


An exception for accessing or deleting a resource that doesn't exist.

HTTP Status Code: 409


An exception for accessing or deleting a resource that doesn't exist.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: