Amazon CloudWatch Events
API Reference (API Version 2015-10-07)


Enables a rule. If the rule does not exist, the operation fails.

Note: When you enable a rule, incoming events might not immediately start matching to a newly enabled rule. Please allow a short period of time for changes to take effect.

Request Syntax

   "Name": "string"

Request Parameters

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

The request accepts the following data in JSON format.


The name of the rule that you want to enable.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: [\.\-_A-Za-z0-9]+

Required: Yes

Response Elements

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


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


This exception occurs if there is concurrent modification on rule or target.

HTTP Status Code: 400


This exception occurs due to unexpected causes.

HTTP Status Code: 500


The rule does not exist.

HTTP Status Code: 400


Enables a rule named "test".

The following is an example of an EnableRule request.

Sample Request

Host: events.<region>.<domain>
x-amz-Date: <Date>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=content-type;date;host;user-agent;x-amz-date;x-amz-target;x-amzn-requestid, Signature=<Signature>
User-Agent: <UserAgentString>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Connection: Keep-Alive 
X-Amz-Target: AWSEvents.EnableRule

    "Name": "test"

Sample Response

HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>