End of support notice: On October 7th, 2026, AWS will discontinue support for AWS IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the AWS IoT Greengrass V1 resources. For more information, please visit [Migrate from AWS IoT Greengrass Version 1](https://docs.aws.amazon.com/greengrass/v2/developerguide/migrate-from-v1.html).

# /greengrass/definition/subscriptions/SubscriptionDefinitionId/versions/SubscriptionDefinitionVersionId


## GET


 `GET /greengrass/definition/subscriptions/SubscriptionDefinitionId/versions/SubscriptionDefinitionVersionId`

Operation ID: [GetSubscriptionDefinitionVersion](getsubscriptiondefinitionversion-get.md)

Retrieves information about a subscription definition version.

Produces: application/json

### Path Parameters


[**SubscriptionDefinitionId**](parameters-subscriptiondefinitionidparam.md)  
The ID of the subscription definition.  
where used: path; required: true  
type: string

[**SubscriptionDefinitionVersionId**](parameters-subscriptiondefinitionversionidparam.md)  
The ID of the subscription definition version. This value maps to the `Version` property of the corresponding `VersionInformation` object, which is returned by `ListSubscriptionDefinitionVersions` requests. If the version is the last one that was associated with a subscription definition, the value also maps to the `LatestVersion` property of the corresponding `DefinitionInformation` object.   
where used: path; required: true  
type: string

### Query Parameters


[**NextToken**](parameters-nexttokenparam.md)  
The token for the next set of results, or `null` if there are no more results.  
where used: query; required: false  
type: string

### CLI


```
aws greengrass get-subscription-definition-version \
  --subscription-definition-id <value> \
  --subscription-definition-version-id <value> \
  [--next-token <value>]  \
  [--cli-input-json <value>] \
  [--generate-cli-skeleton]
```

cli-input-json format:

```
{
"SubscriptionDefinitionId": "string",
"SubscriptionDefinitionVersionId": "string",
"NextToken": "string"
}
```

### Responses


**200** (GetSubscriptionDefinitionVersionResponse)  
  
 [ GetSubscriptionDefinitionVersionResponse](definitions-getsubscriptiondefinitionversionresponse.md)   

```
{
"Arn": "string",
"Id": "string",
"Version": "string",
"CreationTimestamp": "string",
"Definition": {
  "Subscriptions": [
    {
      "Id": "string",
      "Source": "string",
      "Subject": "string",
      "Target": "string"
    }
  ]
},
"NextToken": "string"
}
```  
GetSubscriptionDefinitionVersionResponse  
Information about a subscription definition version.  
type: object  
Arn  
The ARN of the subscription definition version.  
type: string  
Id  
The ID of the subscription definition version.  
type: string  
Version  
The version of the subscription definition version.  
type: string  
CreationTimestamp  
The time, in milliseconds since the epoch, when the subscription definition version was created.  
type: string  
Definition  
Information about a subscription definition version.  
type: object  
Subscriptions  
A list of subscriptions.  
type: array  
items: [Subscription](definitions-subscription.md)  
Subscription  
Information about a subscription.  
type: object  
required: ["Id", "Source", "Subject", "Target"]  
Id  
A descriptive or arbitrary ID for the subscription. This value must be unique within the subscription definition version. Maximum length is 128 characters with the pattern `[a‑zA‑Z0‑9:_‑]+`.  
type: string  
Source  
The source of the subscription. Can be a thing ARN, the ARN of a Lambda function alias (recommended) or version, a connector ARN, 'cloud' (which represents AWS IoT), or 'GGShadowService'. If you specify a Lambda function, this ARN should match the ARN used to add the function to the Greengrass group.  
type: string  
Subject  
The MQTT topic used to route the message.  
type: string  
Target  
Where the message is sent. Can be a thing ARN, the ARN of a Lambda function alias (recommended) or version, a connector ARN, 'cloud' (which represents AWS IoT), or 'GGShadowService'. If you specify a Lambda function, this ARN should match the ARN used to add the function to the Greengrass group.  
type: string  
NextToken  
The token for the next set of results, or `null` if there are no more results.  
type: string

**400**  
Invalid request.  
 [ GeneralError](definitions-generalerror.md)   

```
{
"Message": "string",
"ErrorDetails": [
  {
    "DetailedErrorCode": "string",
    "DetailedErrorMessage": "string"
  }
]
}
```  
GeneralError  
General error information.  
type: object  
required: ["Message"]  
Message  
A message that contains information about the error.  
type: string  
ErrorDetails  
A list of error details.  
type: array  
items: [ErrorDetail](definitions-errordetail.md)  
ErrorDetail  
Details about the error.  
type: object  
DetailedErrorCode  
A detailed error code.  
type: string  
DetailedErrorMessage  
A detailed error message.  
type: string