DescribeAlarmHistory - Amazon CloudWatch


Retrieves the history for the specified alarm. You can filter the results by date range or item type. If an alarm name is not specified, the histories for either all metric alarms or all composite alarms are returned.

CloudWatch retains the history of an alarm even if you delete the alarm.

To use this operation and return information about a composite alarm, you must be signed on with the cloudwatch:DescribeAlarmHistory permission that is scoped to *. You can't return information about composite alarms if your cloudwatch:DescribeAlarmHistory permission has a narrower scope.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.


The name of the alarm.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Required: No


Use this parameter to specify whether you want the operation to return metric alarms or composite alarms. If you omit this parameter, only metric alarms are returned.

Type: Array of strings

Valid Values: CompositeAlarm | MetricAlarm

Required: No


The ending date to retrieve alarm history.

Type: Timestamp

Required: No


The type of alarm histories to retrieve.

Type: String

Valid Values: ConfigurationUpdate | StateUpdate | Action

Required: No


The maximum number of alarm history records to retrieve.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 100.

Required: No


The token returned by a previous call to indicate that there is more data available.

Type: String

Required: No


Specified whether to return the newest or oldest alarm history first. Specify TimestampDescending to have the newest event history returned first, and specify TimestampAscending to have the oldest history returned first.

Type: String

Valid Values: TimestampDescending | TimestampAscending

Required: No


The starting date to retrieve alarm history.

Type: Timestamp

Required: No

Response Elements

The following elements are returned by the service.


The alarm histories, in JSON format.

Type: Array of AlarmHistoryItem objects


The token that marks the start of the next batch of returned results.

Type: String


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


The next token specified is invalid.

HTTP Status Code: 400

See Also

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