# Data Types
<a name="API_Types"></a>

The AWS Security Token Service API contains several data types that various actions use. This section describes each data type in detail.

**Note**  
The order of each element in a data type structure is not guaranteed. Applications should not assume a particular order.

The following data types are supported:
+  [AssumedRoleUser](API_AssumedRoleUser.md) 
+  [Credentials](API_Credentials.md) 
+  [FederatedUser](API_FederatedUser.md) 
+  [PolicyDescriptorType](API_PolicyDescriptorType.md) 
+  [ProvidedContext](API_ProvidedContext.md) 
+  [Tag](API_Tag.md) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS Security Token Service. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query STS` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).