# ListHostKeys


Returns a list of host keys for the server that's specified by the `ServerId` parameter.

## Request Syntax


```
{
   "MaxResults": number,
   "NextToken": "string",
   "ServerId": "string"
}
```

## Request Parameters


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.

 ** [MaxResults](#API_ListHostKeys_RequestSyntax) **   <a name="TransferFamily-ListHostKeys-request-MaxResults"></a>
The maximum number of items to return.  
Type: Integer  
Valid Range: Minimum value of 1. Maximum value of 1000.  
Required: No

 ** [NextToken](#API_ListHostKeys_RequestSyntax) **   <a name="TransferFamily-ListHostKeys-request-NextToken"></a>
When there are additional results that were not returned, a `NextToken` parameter is returned. You can use that value for a subsequent call to `ListHostKeys` to continue listing results.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 6144.  
Required: No

 ** [ServerId](#API_ListHostKeys_RequestSyntax) **   <a name="TransferFamily-ListHostKeys-request-ServerId"></a>
The identifier of the server that contains the host keys that you want to view.  
Type: String  
Length Constraints: Fixed length of 19.  
Pattern: `s-([0-9a-f]{17})`   
Required: Yes

## Response Syntax


```
{
   "HostKeys": [ 
      { 
         "Arn": "string",
         "DateImported": number,
         "Description": "string",
         "Fingerprint": "string",
         "HostKeyId": "string",
         "Type": "string"
      }
   ],
   "NextToken": "string",
   "ServerId": "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.

 ** [HostKeys](#API_ListHostKeys_ResponseSyntax) **   <a name="TransferFamily-ListHostKeys-response-HostKeys"></a>
Returns an array, where each item contains the details of a host key.  
Type: Array of [ListedHostKey](API_ListedHostKey.md) objects

 ** [NextToken](#API_ListHostKeys_ResponseSyntax) **   <a name="TransferFamily-ListHostKeys-response-NextToken"></a>
Returns a token that you can use to call `ListHostKeys` again and receive additional results, if there are any.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 6144.

 ** [ServerId](#API_ListHostKeys_ResponseSyntax) **   <a name="TransferFamily-ListHostKeys-response-ServerId"></a>
Returns the server identifier that contains the listed host keys.  
Type: String  
Length Constraints: Fixed length of 19.  
Pattern: `s-([0-9a-f]{17})` 

## Errors


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

 ** InternalServiceError **   
This exception is thrown when an error occurs in the AWS Transfer Family service.  
HTTP Status Code: 500

 ** InvalidNextTokenException **   
The `NextToken` parameter that was passed is invalid.  
HTTP Status Code: 400

 ** InvalidRequestException **   
This exception is thrown when the client submits a malformed request.  
HTTP Status Code: 400

 ** ResourceNotFoundException **   
This exception is thrown when a resource is not found by the AWSTransfer Family service.  
HTTP Status Code: 400

 ** ServiceUnavailableException **   
The request has failed because the AWSTransfer Family service is not available.  
HTTP Status Code: 500

## 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/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/transfer-2018-11-05/ListHostKeys) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/transfer-2018-11-05/ListHostKeys)