# ConfirmSubscription
<a name="API_ConfirmSubscription"></a>

Verifies an endpoint owner's intent to receive messages by validating the token sent to the endpoint by an earlier `Subscribe` action. If the token is valid, the action creates a new subscription and returns its Amazon Resource Name (ARN). This call requires an AWS signature only when the `AuthenticateOnUnsubscribe` flag is set to "true".

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

 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 ** AuthenticateOnUnsubscribe **   
Disallows unauthenticated unsubscribes of the subscription. If the value of this parameter is `true` and the request has an Amazon signature, then only the topic owner and the subscription owner can unsubscribe the endpoint. The unsubscribe action requires Amazon authentication.   
Type: String  
Required: No

 ** Token **   
Short-lived token sent to an endpoint during the `Subscribe` action.  
Type: String  
Required: Yes

 ** TopicArn **   
The ARN of the topic for which you wish to confirm a subscription.  
Type: String  
Required: Yes

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

The following element is returned by the service.

 ** SubscriptionArn **   
The ARN of the created subscription.  
Type: String

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

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

 ** AuthorizationError **   
Indicates that the user has been denied access to the requested resource.  
HTTP Status Code: 403

 ** FilterPolicyLimitExceeded **   
Indicates that the number of filter polices in your Amazon Web Services account exceeds the limit. To add more filter polices, submit an Amazon SNS Limit Increase case in the Amazon Web Services Support Center.  
HTTP Status Code: 403

 ** InternalError **   
Indicates an internal service error.  
HTTP Status Code: 500

 ** InvalidParameter **   
Indicates that a request parameter does not comply with the associated constraints.  
HTTP Status Code: 400

 ** NotFound **   
Indicates that the requested resource does not exist.  
HTTP Status Code: 404

 ** ReplayLimitExceeded **   
Indicates that the request parameter has exceeded the maximum number of concurrent message replays.  
HTTP Status Code: 403

 ** SubscriptionLimitExceeded **   
Indicates that the customer already owns the maximum allowed number of subscriptions.  
HTTP Status Code: 403

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

The structure of `AUTHPARAMS` depends on the signature of the API request. For more information, see [Examples of the complete Signature Version 4 signing process (Python)](https://docs.amazonaws.cn/general/latest/gr/sigv4-signed-request-examples.html) in the * Amazon General Reference*.

### Example
<a name="API_ConfirmSubscription_Example_1"></a>

This example illustrates one usage of ConfirmSubscription.

#### Sample Request
<a name="API_ConfirmSubscription_Example_1_Request"></a>

```
https://sns.us-east-2.amazonaws.com/?Action=ConfirmSubscription
&TopicArn=arn%3aws%3sns%3us-east-2%3123456789012%3My-Topic
&Token=51b2ff3edb475b7d91550e0ab6edf0c1de2a34e6ebaf6c2262a001bcb7e051c43aa00022ceecce70bd2a67b2042da8d8eb47fef7a4e4e942d23e7fa56146b9ee35da040b4b8af564cc4184a7391c834cb75d75c22981f776ad1ce8805e9bab29da2329985337bb8095627907b46c8577c8440556b6f86582a954758026f41fc62041c4b3f67b0f5921232b5dae5aaca1
&Version=2010-03-31
&AUTHPARAMS
```

#### Sample Response
<a name="API_ConfirmSubscription_Example_1_Response"></a>

```
<ConfirmSubscriptionResponse xmlns="https://sns.amazonaws.com/doc/2010-03-31/">
    <ConfirmSubscriptionResult>
        <SubscriptionArn>arn:aws:sns:us-east-2:123456789012:My-Topic:80289ba6-0fd4-4079-afb4-ce8c8260f0ca</SubscriptionArn>
    </ConfirmSubscriptionResult>
    <ResponseMetadata>
        <RequestId>7a50221f-3774-11df-a9b7-05d48da6f042</RequestId>
    </ResponseMetadata>
</ConfirmSubscriptionResponse>
```

## See Also
<a name="API_ConfirmSubscription_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/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/sns-2010-03-31/ConfirmSubscription) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/sns-2010-03-31/ConfirmSubscription)