# DescribeIpamExternalResourceVerificationTokens
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Describe verification tokens.

A verification token is an Amazon-generated random value that you can use to prove ownership of an external resource. For example, you can use a verification token to validate that you control a public IP address range when you bring an IP address range to Amazon (BYOIP). 

## Request Parameters
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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).

 **DryRun**   
A check for whether you have the required permissions for the action 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**   
One or more filters for the request. For more information about filtering, see [Filtering CLI output](https://docs.amazonaws.cn/cli/latest/userguide/cli-usage-filter.html).  
Available filters:  
+  `ipam-arn` 
+  `ipam-external-resource-verification-token-arn` 
+  `ipam-external-resource-verification-token-id` 
+  `ipam-id` 
+  `ipam-region` 
+  `state` 
+  `status` 
+  `token-name` 
+  `token-value` 
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 **IpamExternalResourceVerificationTokenId.N**   
Verification token IDs.  
Type: Array of strings  
Required: No

 **MaxResults**   
The maximum number of tokens to return in one page of results.  
Type: Integer  
Valid Range: Minimum value of 5. Maximum value of 1000.  
Required: No

 **NextToken**   
The token for the next page of results.  
Type: String  
Required: No

## Response Elements
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The following elements are returned by the service.

 **ipamExternalResourceVerificationTokenSet**   
Verification tokens.  
Type: Array of [IpamExternalResourceVerificationToken](API_IpamExternalResourceVerificationToken.md) objects

 **nextToken**   
The token to use to retrieve the next page of results. This value is `null` when there are no more results to return.  
Type: String

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

## Errors
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For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
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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/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/DescribeIpamExternalResourceVerificationTokens)