# StartAutomationEvent
<a name="API_automation_StartAutomationEvent"></a>

 Initiates a one-time, on-demand automation for the specified recommended action. 

**Note**  
Management accounts and delegated administrators can only initiate recommended actions for associated member accounts. You can associate a member account using `AssociateAccounts`.

## Request Syntax
<a name="API_automation_StartAutomationEvent_RequestSyntax"></a>

```
{
   "clientToken": "string",
   "recommendedActionId": "string"
}
```

## Request Parameters
<a name="API_automation_StartAutomationEvent_RequestParameters"></a>

For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

The request accepts the following data in JSON format.

 ** [clientToken](#API_automation_StartAutomationEvent_RequestSyntax) **   <a name="computeoptimizer-automation_StartAutomationEvent-request-clientToken"></a>
A unique, case-sensitive identifier that you provide to ensure the idempotency of the request. Must be 1-64 characters long and contain only alphanumeric characters, underscores, and hyphens.  
Type: String  
Pattern: `[a-zA-Z0-9_-]{1,64}`   
Required: No

 ** [recommendedActionId](#API_automation_StartAutomationEvent_RequestSyntax) **   <a name="computeoptimizer-automation_StartAutomationEvent-request-recommendedActionId"></a>
 The ID of the recommended action to automate.   
Type: String  
Pattern: `[0-9A-Za-z]{16}`   
Required: Yes

## Response Syntax
<a name="API_automation_StartAutomationEvent_ResponseSyntax"></a>

```
{
   "eventId": "string",
   "eventStatus": "string",
   "recommendedActionId": "string"
}
```

## Response Elements
<a name="API_automation_StartAutomationEvent_ResponseElements"></a>

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

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

 ** [eventId](#API_automation_StartAutomationEvent_ResponseSyntax) **   <a name="computeoptimizer-automation_StartAutomationEvent-response-eventId"></a>
The ID of the automation event.  
Type: String  
Pattern: `[0-9A-Za-z]{16}` 

 ** [eventStatus](#API_automation_StartAutomationEvent_ResponseSyntax) **   <a name="computeoptimizer-automation_StartAutomationEvent-response-eventStatus"></a>
The current status of the automation event.  
Type: String  
Valid Values: `Ready | InProgress | Complete | Failed | Cancelled | RollbackReady | RollbackInProgress | RollbackComplete | RollbackFailed` 

 ** [recommendedActionId](#API_automation_StartAutomationEvent_ResponseSyntax) **   <a name="computeoptimizer-automation_StartAutomationEvent-response-recommendedActionId"></a>
The ID of the recommended action being automated.  
Type: String  
Pattern: `[0-9A-Za-z]{16}` 

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

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** AccessDeniedException **   
 You do not have sufficient permissions to perform this action.   
HTTP Status Code: 400

 ** ForbiddenException **   
 You are not authorized to perform this action.   
HTTP Status Code: 400

 ** IdempotencyTokenInUseException **   
 The specified client token is already in use.   
HTTP Status Code: 400

 ** IdempotentParameterMismatchException **   
Exception thrown when the same client token is used with different parameters, indicating a mismatch in idempotent request parameters.  
HTTP Status Code: 400

 ** InternalServerException **   
 An internal error occurred while processing the request.   
HTTP Status Code: 500

 ** InvalidParameterValueException **   
 One or more parameter values are not valid.   
HTTP Status Code: 400

 ** OptInRequiredException **   
 The account must be opted in to Compute Optimizer Automation before performing this action.   
HTTP Status Code: 400

 ** ResourceNotFoundException **   
 The specified resource was not found.   
HTTP Status Code: 400

 ** ServiceQuotaExceededException **   
 The request would exceed service quotas.   
HTTP Status Code: 400

 ** ServiceUnavailableException **   
 The service is temporarily unavailable.   
HTTP Status Code: 500

 ** ThrottlingException **   
 The request was denied due to request throttling.   
HTTP Status Code: 400

## See Also
<a name="API_automation_StartAutomationEvent_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/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/compute-optimizer-automation-2025-09-22/StartAutomationEvent) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/compute-optimizer-automation-2025-09-22/StartAutomationEvent)