# Managing subscriptions for an Amazon Q Business application using APIs
<a name="subscription-management-api"></a>

Amazon Q Business provides APIs to manage subscriptions in your Amazon Q Business application. You can use these APIs to implement your own subscription management solution if you create a Amazon Q Business application environment programmatically.

**Note**  
As of Dec 17, 2024, Amazon Q Business will recognize all email addresses as case-insensitive and recognize subaddresses as equivalent to the original email address. For example, JohnDoe@example.com, johndoe@example.com, and johndoe\$1work@example.com will be considered the same email address. For assistance with applications or to report a concern, contact Support, sign into the [AWS Support Center](https://console.aws.amazon.com/support/home#/) .


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| API action | API description | Relevant User Guide topic | 
| --- | --- | --- | 
| [CreateSubscription](https://docs.aws.amazon.com/amazonq/latest/api-reference/API_CreateSubscription.html) | Subscribes an IAM Identity Center user or a group to a pricing tier for an Amazon Q Business application  If you're using IAM federation to manage user and group access to Amazon Q Business, subscriptions are created automatically when a user logs in to their Amazon Q Business application.  | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/amazonq/latest/qbusiness-ug/subscription-management-api.html) | 
| [CancelSubscription](https://docs.aws.amazon.com/amazonq/latest/api-reference/API_CancelSubscription.html) | Unsubscribes a user or a group from their pricing tier in an Amazon Q Business application | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/amazonq/latest/qbusiness-ug/subscription-management-api.html) | 
| [ListSubscriptions](https://docs.aws.amazon.com/amazonq/latest/api-reference/API_ListSubscriptions.html) | Lists all subscriptions created in an Amazon Q Business application | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/amazonq/latest/qbusiness-ug/subscription-management-api.html) | 
| [UpdateSubscription](https://docs.aws.amazon.com/amazonq/latest/api-reference/API_UpdateSubscription.html) | Updates the pricing tier for an Amazon Q Business subscription | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/amazonq/latest/qbusiness-ug/subscription-management-api.html) |