# ListSubChannels


Lists all the SubChannels in an elastic channel when given a channel ID. Available only to the app instance admins and channel moderators of elastic channels.

## Request Syntax


```
GET /channels/channelArn/subchannels?max-results=MaxResults&next-token=NextToken HTTP/1.1
x-amz-chime-bearer: ChimeBearer
```

## URI Request Parameters


The request uses the following URI parameters.

 ** [channelArn](#API_messaging-chime_ListSubChannels_RequestSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-request-uri-ChannelArn"></a>
The ARN of elastic channel.  
Length Constraints: Minimum length of 5. Maximum length of 1600.  
Pattern: `arn:[a-z0-9-\.]{1,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[^/].{0,1023}`   
Required: Yes

 ** [ChimeBearer](#API_messaging-chime_ListSubChannels_RequestSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-request-ChimeBearer"></a>
The `AppInstanceUserArn` of the user making the API call.  
Length Constraints: Minimum length of 5. Maximum length of 1600.  
Pattern: `arn:[a-z0-9-\.]{1,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[^/].{0,1023}`   
Required: Yes

 ** [MaxResults](#API_messaging-chime_ListSubChannels_RequestSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-request-uri-MaxResults"></a>
The maximum number of sub-channels that you want to return.  
Valid Range: Minimum value of 1. Maximum value of 50.

 ** [NextToken](#API_messaging-chime_ListSubChannels_RequestSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-request-uri-NextToken"></a>
The token passed by previous API calls until all requested sub-channels are returned.  
Length Constraints: Minimum length of 0. Maximum length of 2048.  
Pattern: `.*` 

## Request Body


The request does not have a request body.

## Response Syntax


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

{
   "ChannelArn": "string",
   "NextToken": "string",
   "SubChannels": [ 
      { 
         "MembershipCount": number,
         "SubChannelId": "string"
      }
   ]
}
```

## Response Elements


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

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

 ** [ChannelArn](#API_messaging-chime_ListSubChannels_ResponseSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-response-ChannelArn"></a>
The ARN of elastic channel.  
Type: String  
Length Constraints: Minimum length of 5. Maximum length of 1600.  
Pattern: `arn:[a-z0-9-\.]{1,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[a-z0-9-\.]{0,63}:[^/].{0,1023}` 

 ** [NextToken](#API_messaging-chime_ListSubChannels_ResponseSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-response-NextToken"></a>
The token passed by previous API calls until all requested sub-channels are returned.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 2048.  
Pattern: `.*` 

 ** [SubChannels](#API_messaging-chime_ListSubChannels_ResponseSyntax) **   <a name="chimesdk-messaging-chime_ListSubChannels-response-SubChannels"></a>
The information about each sub-channel.  
Type: Array of [SubChannelSummary](API_messaging-chime_SubChannelSummary.md) objects

## Errors


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

 ** BadRequestException **   
The input parameters don't match the service's restrictions.  
HTTP Status Code: 400

 ** ForbiddenException **   
The client is permanently forbidden from making the request.  
HTTP Status Code: 403

 ** ServiceFailureException **   
The service encountered an unexpected error.  
HTTP Status Code: 500

 ** ServiceUnavailableException **   
The service is currently unavailable.  
HTTP Status Code: 503

 ** ThrottledClientException **   
The client exceeded its request rate limit.  
HTTP Status Code: 429

 ** UnauthorizedClientException **   
The client is not currently authorized to make the request.  
HTTP Status Code: 401

## See Also


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/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/chime-sdk-messaging-2021-05-15/ListSubChannels) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/chime-sdk-messaging-2021-05-15/ListSubChannels)