# HTTP/HTTPS subscription confirmation JSON format
<a name="http-subscription-confirmation-json"></a>

After you subscribe an HTTP/HTTPS endpoint, Amazon SNS sends a subscription confirmation message to the HTTP/HTTPS endpoint. This message contains a `SubscribeURL` value that you must visit to confirm the subscription (alternatively, you can use the `Token` value with the [https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html](https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html)). 

**Note**  
Amazon SNS doesn't send notifications to this endpoint until the subscription is confirmed

The subscription confirmation message is a POST message with a message body that contains a JSON document with the following name-value pairs.

**`Type`**  
The type of message. For a subscription confirmation, the type is `SubscriptionConfirmation`.

**`MessageId`**  
A Universally Unique Identifier (UUID), unique for each message published. For a message that Amazon SNS resends during a retry, the message ID of the original message is used.

**`Token`**  
A value you can use with the [https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html](https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html) action to confirm the subscription. Alternatively, you can simply visit the `SubscribeURL`.

**`TopicArn`**  
The Amazon Resource Name (ARN) for the topic that this endpoint is subscribed to.

**`Message`**  
A string that describes the message. For subscription confirmation, this string looks like this:  

```
You have chosen to subscribe to the topic arn:aws:sns:us-east-2:123456789012:MyTopic.\nTo confirm the subscription, visit the SubscribeURL included in this message.
```

**`SubscribeURL`**  
The URL that you must visit in order to confirm the subscription. Alternatively, you can instead use the `Token` with the [https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html](https://docs.aws.amazon.com/sns/latest/api/API_ConfirmSubscription.html) action to confirm the subscription.

**`Timestamp`**  
The time (GMT) when the subscription confirmation was sent.

**`SignatureVersion`**  
Version of the Amazon SNS signature used.  
+ If the `SignatureVersion` is **1**, `Signature` is a Base64-encoded `SHA1withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values. 
+ If the `SignatureVersion` is **2**, `Signature` is a Base64-encoded `SHA256withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values.

**`Signature`**  
Base64-encoded `SHA1withRSA` or `SHA256withRSA` signature of the `Message`, `MessageId`, `Type`, `Timestamp`, and `TopicArn` values.

**`SigningCertURL`**  
The URL to the certificate that was used to sign the message.

The following HTTP POST message is an example of a `SubscriptionConfirmation` message to an HTTP endpoint.

```
POST / HTTP/1.1
x-amz-sns-message-type: SubscriptionConfirmation
x-amz-sns-message-id: 165545c9-2a5c-472c-8df2-7ff2be2b3b1b
x-amz-sns-topic-arn: arn:aws:sns:us-west-2:123456789012:MyTopic
Content-Length: 1336
Content-Type: text/plain; charset=UTF-8
Host: myhost.example.com
Connection: Keep-Alive
User-Agent: Amazon Simple Notification Service Agent

{
  "Type" : "SubscriptionConfirmation",
  "MessageId" : "165545c9-2a5c-472c-8df2-7ff2be2b3b1b",
  "Token" : "2336412f37...",
  "TopicArn" : "arn:aws:sns:us-west-2:123456789012:MyTopic",
  "Message" : "You have chosen to subscribe to the topic arn:aws:sns:us-west-2:123456789012:MyTopic.\nTo confirm the subscription, visit the SubscribeURL included in this message.",
  "SubscribeURL" : "https://sns.us-west-2.amazonaws.com/?Action=ConfirmSubscription&TopicArn=arn:aws:sns:us-west-2:123456789012:MyTopic&Token=2336412f37...",
  "Timestamp" : "2012-04-26T20:45:04.751Z",
  "SignatureVersion" : "1",
  "Signature" : "EXAMPLEpH+DcEwjAPg8O9mY8dReBSwksfg2S7WKQcikcNKWLQjwu6A4VbeS0QHVCkhRS7fUQvi2egU3N858fiTDN6bkkOxYDVrY0Ad8L10Hs3zH81mtnPk5uvvolIC1CXGu43obcgFxeL3khZl8IKvO61GWB6jI9b5+gLPoBc1Q=",
  "SigningCertURL" : "https://sns.us-west-2.amazonaws.com/SimpleNotificationService-f3ecfb7224c7233fe7bb5f59f96de52f.pem"
}
```