# InvocationStepPayload
<a name="API_agent-runtime_InvocationStepPayload"></a>

Payload content, such as text and images, for the invocation step.

## Contents
<a name="API_agent-runtime_InvocationStepPayload_Contents"></a>

**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** contentBlocks **   <a name="bedrock-Type-agent-runtime_InvocationStepPayload-contentBlocks"></a>
The content for the invocation step.  
Type: Array of [BedrockSessionContentBlock](API_agent-runtime_BedrockSessionContentBlock.md) objects  
Array Members: Minimum number of 1 item.  
Required: No

## See Also
<a name="API_agent-runtime_InvocationStepPayload_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/bedrock-agent-runtime-2023-07-26/InvocationStepPayload) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-agent-runtime-2023-07-26/InvocationStepPayload) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-agent-runtime-2023-07-26/InvocationStepPayload)