# DescribeApplicationStatusChecks
<a name="API_DescribeApplicationStatusChecks"></a>

Describes one or more application status checks. Returns configuration details for your application status checks, including protocol, port, path, thresholds, and associations. The following rules apply:
+ If you do not specify any application status check IDs, all checks in your account are returned.
+ Use `DescribeApplicationStatus` to see the actual health status of instances.

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

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **ApplicationStatusCheckId.N**   
The IDs of the application status checks to describe.  
Type: Array of strings  
Required: No

 **DryRun**   
Checks whether you have the required permissions for the operation, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

 **Filter.N**   
The filters.  
+  `tag`:<*key*> - The key/value combination of a tag assigned to the application status check. Use the tag key in the filter name and the tag value as the filter value.
+  `tag-key` - The key of a tag assigned to the application status check. Use this filter to find all application status checks that have a tag with a specific key, regardless of the tag value.
+  `tag-value` - The value of a tag assigned to the application status check. Use this filter to find all application status checks that have a tag with a specific value, regardless of the tag key.
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 **IncludeAll**   
Specifies whether to return all application status checks, including those that are not currently associated with any instances.  
Type: Boolean  
Required: No

 **MaxResults**   
The maximum number of items to return for this request. To get the next page of items, make another request with the token returned in the output. For more information, see [Pagination](https://docs.amazonaws.cn/AWSEC2/latest/APIReference/Query-Requests.html#api-pagination).  
Type: Integer  
Valid Range: Minimum value of 5. Maximum value of 100.  
Required: No

 **NextToken**   
The token returned from a previous paginated request. Pagination continues from the end of the items returned by the previous request.  
Type: String  
Required: No

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

The following elements are returned by the service.

 **applicationStatusCheckSet**   
Information about the application status checks.  
Type: Array of [ApplicationStatusCheckResponseObject](API_ApplicationStatusCheckResponseObject.md) objects

 **nextToken**   
The token to include in another request to get the next page of items. This value is <code>null</code> when there are no more items to return.  
Type: String

 **requestId**   
The ID of the request.  
Type: String

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

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

## Examples
<a name="API_DescribeApplicationStatusChecks_Examples"></a>

### To describe application status checks
<a name="API_DescribeApplicationStatusChecks_Example_1"></a>

This example describes the specified application status check.

#### Sample Request
<a name="API_DescribeApplicationStatusChecks_Example_1_Request"></a>

```
https://ec2.amazonaws.com/?Action=DescribeApplicationStatusChecks
&ApplicationStatusCheckId.1=asc-0123456789abcdef0
&AUTHPARAMS
```

#### Sample Response
<a name="API_DescribeApplicationStatusChecks_Example_1_Response"></a>

```
<DescribeApplicationStatusChecksResult xmlns="http://ec2.amazonaws.com/doc/2016-11-15/">
    <requestId>59dbff89-35bd-4eac-99ed-be587EXAMPLE</requestId>
    <applicationStatusCheckSet>
        <item>
            <applicationStatusCheckId>asc-0123456789abcdef0</applicationStatusCheckId>
            <protocol>http</protocol>
            <port>80</port>
        </item>
    </applicationStatusCheckSet>
</DescribeApplicationStatusChecksResult>
```

## See Also
<a name="API_DescribeApplicationStatusChecks_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/DescribeApplicationStatusChecks) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/DescribeApplicationStatusChecks)