# `aws:assertAwsResourceProperty` – Assert an Amazon resource state or event state
<a name="automation-action-assertAwsResourceProperty"></a>

The `aws:assertAwsResourceProperty` action lets you assert a specific resource state or event state for a specific Automation step.

**Note**  
The `aws:assertAwsResourceProperty` action supports automatic throttling retry. For more information, see [Configuring automatic retry for throttled operations](automation-throttling-retry.md).

For more examples of how to use this action, see [Additional runbook examples](automation-document-examples.md).

**Input**  
Inputs are defined by the API operation that you choose. 

------
#### [ YAML ]

```
action: aws:assertAwsResourceProperty
inputs:
  Service: {{The official namespace of the service}}
  Api: {{The API operation or method name}}
  {{API operation inputs or parameters}}: {{A value}}
  PropertySelector: {{Response object}}
  DesiredValues:
  - {{Desired property values}}
```

------
#### [ JSON ]

```
{
  "action": "aws:assertAwsResourceProperty",
  "inputs": {
    "Service":"{{The official namespace of the service}}",
    "Api":"{{The API operation or method name}}",
    "{{API operation inputs or parameters}}":"{{A value}}",
    "PropertySelector": "{{Response object}}",
    "DesiredValues": [
      "{{Desired property values}}"
    ]
  }
}
```

------

Service  
The Amazon Web Services service namespace that contains the API operation that you want to run. For example, the namespace for Systems Manager is `ssm`. The namespace for Amazon EC2 is `ec2`. You can view a list of supported Amazon Web Services service namespaces in the [Available Services](https://docs.amazonaws.cn/cli/latest/reference/#available-services) section of the *Amazon CLI Command Reference*.  
Type: String  
Required: Yes

Api  
The name of the API operation that you want to run. You can view the API operations (also called methods) by choosing a service in the left navigation on the following [Services Reference](https://docs.amazonaws.cn/boto3/latest/reference/services/index.html) page. Choose a method in the **Client** section for the service that you want to invoke. For example, all API operations (methods) for Amazon Relational Database Service (Amazon RDS) are listed on the following page: [Amazon RDS methods](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html).  
Type: String  
Required: Yes

API operation inputs  
One or more API operation inputs. You can view the available inputs (also called parameters) by choosing a service in the left navigation on the following [Services Reference](https://docs.amazonaws.cn/boto3/latest/reference/services/index.html) page. Choose a method in the **Client** section for the service that you want to invoke. For example, all methods for Amazon RDS are listed on the following page: [Amazon RDS methods](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html). Choose the [describe\_db\_instances](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html#RDS.Client.describe_db_instances) method and scroll down to see the available parameters, such as **DBInstanceIdentifier**, **Name**, and **Values**. Use the following format to specify more than one input.  

```
inputs:
  Service: {{The official namespace of the service}}
  Api: {{The API operation name}}
  {{API input 1}}: {{A value}}
  {{API Input 2}}: {{A value}}
 {{ API Input 3}}: {{A value}}
```

```
"inputs":{
      "Service":"{{The official namespace of the service}}",
      "Api":"{{The API operation name}}",
      "{{API input 1}}":"{{A value}}",
      "{{API Input 2}}":"{{A value}}",
      "{{API Input 3}}":"{{A value}}"
}
```
Type: Determined by chosen API operation  
Required: Yes

PropertySelector  
The JSONPath to a specific attribute in the response object. You can view the response objects by choosing a service in the left navigation on the following [Services Reference](https://docs.amazonaws.cn/boto3/latest/reference/services/index.html) page. Choose a method in the **Client** section for the service that you want to invoke. For example, all methods for Amazon RDS are listed on the following page: [Amazon RDS methods](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html). Choose the [describe\_db\_instances](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rds.html#RDS.Client.describe_db_instances) method and scroll down to the **Response Structure** section. **DBInstances** is listed as a response object.  
Type: String  
Required: Yes

DesiredValues  
The expected status or state on which to continue the automation. If you specify a Boolean value, you must use a capital letter such as True or False.  
Type: StringList  
Required: Yes