# ListApplications
<a name="API_ListApplications"></a>

**Important**  
 AWS Mainframe Modernization Service (Managed Runtime Environment experience) will no longer be open to new customers starting on November 7, 2025. If you would like to use the service, please sign up prior to November 7, 2025. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html).

Lists the applications associated with a specific AWS account. You can provide the unique identifier of a specific runtime environment in a query parameter to see all applications associated with that environment.

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

```
GET /applications?environmentId=environmentId&maxResults=maxResults&names=names&nextToken=nextToken HTTP/1.1
```

## URI Request Parameters
<a name="API_ListApplications_RequestParameters"></a>

The request uses the following URI parameters.

 ** [environmentId](#API_ListApplications_RequestSyntax) **   <a name="m2-ListApplications-request-uri-environmentId"></a>
The unique identifier of the runtime environment where the applications are deployed.  
Pattern: `\S{1,80}` 

 ** [maxResults](#API_ListApplications_RequestSyntax) **   <a name="m2-ListApplications-request-uri-maxResults"></a>
The maximum number of applications to return.  
Valid Range: Minimum value of 1. Maximum value of 2000.

 ** [names](#API_ListApplications_RequestSyntax) **   <a name="m2-ListApplications-request-uri-names"></a>
The names of the applications.  
Array Members: Minimum number of 1 item. Maximum number of 10 items.  
Pattern: `[A-Za-z0-9][A-Za-z0-9_\-]{1,59}` 

 ** [nextToken](#API_ListApplications_RequestSyntax) **   <a name="m2-ListApplications-request-uri-nextToken"></a>
A pagination token to control the number of applications displayed in the list.  
Pattern: `\S{1,2000}` 

## Request Body
<a name="API_ListApplications_RequestBody"></a>

The request does not have a request body.

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

```
HTTP/1.1 200
Content-type: application/json

{
   "applications": [ 
      { 
         "applicationArn": "string",
         "applicationId": "string",
         "applicationVersion": number,
         "creationTime": number,
         "deploymentStatus": "string",
         "description": "string",
         "engineType": "string",
         "environmentId": "string",
         "lastStartTime": number,
         "name": "string",
         "roleArn": "string",
         "status": "string",
         "versionStatus": "string"
      }
   ],
   "nextToken": "string"
}
```

## Response Elements
<a name="API_ListApplications_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.

 ** [applications](#API_ListApplications_ResponseSyntax) **   <a name="m2-ListApplications-response-applications"></a>
Returns a list of summary details for all the applications in a runtime environment.  
Type: Array of [ApplicationSummary](API_ApplicationSummary.md) objects

 ** [nextToken](#API_ListApplications_ResponseSyntax) **   <a name="m2-ListApplications-response-nextToken"></a>
A pagination token that's returned when the response doesn't contain all applications.  
Type: String  
Pattern: `\S{1,2000}` 

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

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

 ** AccessDeniedException **   
The account or role doesn't have the right permissions to make the request.  
HTTP Status Code: 403

 ** InternalServerException **   
An unexpected error occurred during the processing of the request.    
 ** retryAfterSeconds **   
The number of seconds to wait before retrying the request.
HTTP Status Code: 500

 ** ThrottlingException **   
The number of requests made exceeds the limit.    
 ** quotaCode **   
The identifier of the throttled request.  
 ** retryAfterSeconds **   
The number of seconds to wait before retrying the request.  
 ** serviceCode **   
The identifier of the service that the throttled request was made to.
HTTP Status Code: 429

 ** ValidationException **   
One or more parameters provided in the request is not valid.    
 ** fieldList **   
The list of fields that failed service validation.  
 ** reason **   
The reason why it failed service validation.
HTTP Status Code: 400

## See Also
<a name="API_ListApplications_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/m2-2021-04-28/ListApplications) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/m2-2021-04-28/ListApplications) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/m2-2021-04-28/ListApplications) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/m2-2021-04-28/ListApplications) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/m2-2021-04-28/ListApplications) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/m2-2021-04-28/ListApplications) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/m2-2021-04-28/ListApplications) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/m2-2021-04-28/ListApplications) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/m2-2021-04-28/ListApplications) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/m2-2021-04-28/ListApplications)