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User Guide

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[ aws . ec2 ]



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 purchase-scheduled-instances to purchase Scheduled Instances with that schedule.

See also: AWS API Documentation


[--dry-run | --no-dry-run]
[--filters <value>]
--first-slot-start-time-range <value>
[--max-results <value>]
[--max-slot-duration-in-hours <value>]
[--min-slot-duration-in-hours <value>]
[--next-token <value>]
--recurrence <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--dry-run | --no-dry-run (boolean)

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 .

--filters (list)

One or more filters.

  • availability-zone - The Availability Zone (for example, us-west-2a ).
  • instance-type - The instance type (for example, c4.large ).
  • network-platform - The network platform (EC2-Classic or EC2-VPC ).
  • platform - The platform (Linux/UNIX or Windows ).

Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

    "Name": "string",
    "Values": ["string", ...]

--first-slot-start-time-range (structure)

The time period for the first schedule to start.

Shorthand Syntax:


JSON Syntax:

  "EarliestTime": timestamp,
  "LatestTime": timestamp

--max-results (integer)

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.

--max-slot-duration-in-hours (integer)

The maximum available duration, in hours. This value must be greater than MinSlotDurationInHours and less than 1,720.

--min-slot-duration-in-hours (integer)

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.

--next-token (string)

The token for the next set of results.

--recurrence (structure)

The schedule recurrence.

Shorthand Syntax:


JSON Syntax:

  "Frequency": "string",
  "Interval": integer,
  "OccurrenceDays": [integer, ...],
  "OccurrenceRelativeToEnd": true|false,
  "OccurrenceUnit": "string"

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.


To describe an available schedule

This example describes a schedule that occurs every week on Sunday, starting on the specified date.


aws ec2 describe-scheduled-instance-availability --recurrence Frequency=Weekly,Interval=1,OccurrenceDays=[1] --first-slot-start-time-range EarliestTime=2016-01-31T00:00:00Z,LatestTime=2016-01-31T04:00:00Z


  "ScheduledInstanceAvailabilitySet": [
        "AvailabilityZone": "us-west-2b",
        "TotalScheduledInstanceHours": 1219,
        "PurchaseToken": "eyJ2IjoiMSIsInMiOjEsImMiOi...",
        "MinTermDurationInDays": 366,
        "AvailableInstanceCount": 20,
        "Recurrence": {
            "OccurrenceDaySet": [
            "Interval": 1,
            "Frequency": "Weekly",
            "OccurrenceRelativeToEnd": false
        "Platform": "Linux/UNIX",
        "FirstSlotStartTime": "2016-01-31T00:00:00Z",
        "MaxTermDurationInDays": 366,
        "SlotDurationInHours": 23,
        "NetworkPlatform": "EC2-VPC",
        "InstanceType": "c4.large",
        "HourlyPrice": "0.095"

To narrow the results, you can add filters that specify the operating system, network, and instance type.


--filters Name=platform,Values=Linux/UNIX Name=network-platform,Values=EC2-VPC Name=instance-type,Values=c4.large


NextToken -> (string)

The token required to retrieve the next set of results. This value is null when there are no more results to return.

ScheduledInstanceAvailabilitySet -> (list)

Information about the available Scheduled Instances.


Describes a schedule that is available for your Scheduled Instances.

AvailabilityZone -> (string)

The Availability Zone.

AvailableInstanceCount -> (integer)

The number of available instances.

FirstSlotStartTime -> (timestamp)

The time period for the first schedule to start.

HourlyPrice -> (string)

The hourly price for a single instance.

InstanceType -> (string)

The instance type. You can specify one of the C3, C4, M4, or R3 instance types.

MaxTermDurationInDays -> (integer)

The maximum term. The only possible value is 365 days.

MinTermDurationInDays -> (integer)

The minimum term. The only possible value is 365 days.

NetworkPlatform -> (string)

The network platform (EC2-Classic or EC2-VPC ).

Platform -> (string)

The platform (Linux/UNIX or Windows ).

PurchaseToken -> (string)

The purchase token. This token expires in two hours.

Recurrence -> (structure)

The schedule recurrence.

Frequency -> (string)

The frequency (Daily , Weekly , or Monthly ).

Interval -> (integer)

The interval quantity. The interval unit depends on the value of frequency . For example, every 2 weeks or every 2 months.

OccurrenceDaySet -> (list)

The days. For a monthly schedule, this is one or more days of the month (1-31). For a weekly schedule, this is one or more days of the week (1-7, where 1 is Sunday).


OccurrenceRelativeToEnd -> (boolean)

Indicates whether the occurrence is relative to the end of the specified week or month.

OccurrenceUnit -> (string)

The unit for occurrenceDaySet (DayOfWeek or DayOfMonth ).

SlotDurationInHours -> (integer)

The number of hours in the schedule.

TotalScheduledInstanceHours -> (integer)

The total number of hours for a single instance for the entire term.