# DescribeScheduledInstanceAvailability
<a name="API_DescribeScheduledInstanceAvailability"></a>

Finds available schedules that meet the specified criteria.

You can search for an available schedule no more than 3 months in advance. You must meet the minimum required duration of 1,200 hours per year. For example, the minimum daily schedule is 4 hours, the minimum weekly schedule is 24 hours, and the minimum monthly schedule is 100 hours.

After you find a schedule that meets your needs, call [PurchaseScheduledInstances](API_PurchaseScheduledInstances.md) to purchase Scheduled Instances with that schedule.

## 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).

 **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**   
The filters.  
+  `availability-zone` - The Availability Zone (for example, `us-west-2a`).
+  `instance-type` - The instance type (for example, `c4.large`).
+  `platform` - The platform (`Linux/UNIX` or `Windows`).
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 **FirstSlotStartTimeRange**   
The time period for the first schedule to start.  
Type: [SlotDateTimeRangeRequest](API_SlotDateTimeRangeRequest.md) object  
Required: Yes

 **MaxResults**   
The maximum number of results to return in a single call. This value can be between 5 and 300. The default value is 300. To retrieve the remaining results, make another call with the returned `NextToken` value.  
Type: Integer  
Valid Range: Minimum value of 5. Maximum value of 300.  
Required: No

 **MaxSlotDurationInHours**   
The maximum available duration, in hours. This value must be greater than `MinSlotDurationInHours` and less than 1,720.  
Type: Integer  
Required: No

 **MinSlotDurationInHours**   
The minimum available duration, in hours. The minimum required duration is 1,200 hours per year. For example, the minimum daily schedule is 4 hours, the minimum weekly schedule is 24 hours, and the minimum monthly schedule is 100 hours.  
Type: Integer  
Required: No

 **NextToken**   
The token for the next set of results.  
Type: String  
Required: No

 **Recurrence**   
The schedule recurrence.  
Type: [ScheduledInstanceRecurrenceRequest](API_ScheduledInstanceRecurrenceRequest.md) object  
Required: Yes

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

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

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

 **scheduledInstanceAvailabilitySet**   
Information about the available Scheduled Instances.  
Type: Array of [ScheduledInstanceAvailability](API_ScheduledInstanceAvailability.md) objects

## Errors
<a name="API_DescribeScheduledInstanceAvailability_Errors"></a>

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

## See Also
<a name="API_DescribeScheduledInstanceAvailability_SeeAlso"></a>

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