# MessageMetadata
<a name="API_MessageMetadata"></a>

Metadata information associated with this message.

## Contents
<a name="API_MessageMetadata_Contents"></a>

 ** eventId **   <a name="BedrockAgentCore-Type-MessageMetadata-eventId"></a>
The identifier of the event associated with this message.  
Type: String  
Required: Yes

 ** messageIndex **   <a name="BedrockAgentCore-Type-MessageMetadata-messageIndex"></a>
The position of this message within that event’s ordered list of messages.  
Type: Integer  
Required: Yes

## See Also
<a name="API_MessageMetadata_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-agentcore-2024-02-28/MessageMetadata) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-agentcore-2024-02-28/MessageMetadata) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-agentcore-2024-02-28/MessageMetadata)