<p>Lists summary information about the retained messages stored for the account.</p> <p>This action returns only the topic names of the retained messages. It doesn't return any message payloads. Although this action doesn't return a message payload, it can still incur messaging costs.</p> <p>To get the message payload of a retained message, call <a href="https://docs.aws.amazon.com/iot/latest/apireference/API_iotdata_GetRetainedMessage.html">GetRetainedMessage</a> with the topic name of the retained message.</p> <p>Requires permission to access the <a href="https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsiotfleethubfordevicemanagement.html#awsiotfleethubfordevicemanagement-actions-as-permissions">ListRetainedMessages</a> action.</p> <p>For more information about messaging costs, see <a href="http://aws.amazon.com/iot-core/pricing/#Messaging">Amazon Web Services IoT Core pricing - Messaging</a>.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}