# UpdateAnomalyMonitor
<a name="API_UpdateAnomalyMonitor"></a>

Updates an existing cost anomaly monitor. The changes made are applied going forward, and doesn't change anomalies detected in the past. 

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

```
{
   "MonitorArn": "string",
   "MonitorName": "string"
}
```

## Request Parameters
<a name="API_UpdateAnomalyMonitor_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.

 ** [MonitorArn](#API_UpdateAnomalyMonitor_RequestSyntax) **   <a name="awscostmanagement-UpdateAnomalyMonitor-request-MonitorArn"></a>
Cost anomaly monitor Amazon Resource Names (ARNs).   
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 1024.  
Pattern: `[\S\s]*`   
Required: Yes

 ** [MonitorName](#API_UpdateAnomalyMonitor_RequestSyntax) **   <a name="awscostmanagement-UpdateAnomalyMonitor-request-MonitorName"></a>
The new name for the cost anomaly monitor.   
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 1024.  
Pattern: `[\S\s]*`   
Required: No

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

```
{
   "MonitorArn": "string"
}
```

## Response Elements
<a name="API_UpdateAnomalyMonitor_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.

 ** [MonitorArn](#API_UpdateAnomalyMonitor_ResponseSyntax) **   <a name="awscostmanagement-UpdateAnomalyMonitor-response-MonitorArn"></a>
A cost anomaly monitor ARN.   
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 1024.  
Pattern: `[\S\s]*` 

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

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

 ** LimitExceededException **   
You made too many calls in a short period of time. Try again later.  
HTTP Status Code: 400

 ** UnknownMonitorException **   
The cost anomaly monitor does not exist for the account.   
HTTP Status Code: 400

## See Also
<a name="API_UpdateAnomalyMonitor_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/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/ce-2017-10-25/UpdateAnomalyMonitor) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ce-2017-10-25/UpdateAnomalyMonitor)