Detect metrics export pricing

When you publish cloud-side, device-side, or custom metrics to an MQTT topic that you configure, you will not incur charges for this step of the metrics export process. However, in the subsequent steps when you transfer the published metrics to a destination of your choice by using Rules Engine or Messaging, you will incur costs based on the method of transferring that you choose. AWS IoT Device Defender publishes batched metrics to MQTT topics as a single message that contains metrics data for multiple devices, which helps lower costs. For more information regarding pricing, see the AWS Pricing Calculator.