EventBridge
Terraform module to create AWS EventBridge resources
Charged by usage
3These stay near zero until there is traffic, and are the hardest to predict from source alone.
CloudWatch
aws_cloudwatch_event_archiveStored GB of archived events per month.
EventBridge
aws_cloudwatch_event_busPer million custom or third-party events published. AWS service events are free.
EventBridge
aws_pipes_pipePer request processed through the pipe, by payload size.
Not classified
3Not in the cost table yet, so they are reported rather than assumed free.
EventBridge
aws_scheduler_scheduleEventBridge
aws_scheduler_schedule_groupEventBridge
aws_schemas_discoverer
No charge
12These carry no charge of their own, though some of them govern resources that do.
CloudWatch
aws_cloudwatch_event_api_destinationCloudWatch
aws_cloudwatch_event_connectionCloudWatch
aws_cloudwatch_event_permissionCloudWatch
aws_cloudwatch_log_deliveryCloudWatch
aws_cloudwatch_log_delivery_destinationFree itself; whatever it delivers to — a log group, a bucket, a firehose — bills for what arrives.
CloudWatch
aws_cloudwatch_log_delivery_sourceEventBridge
aws_cloudwatch_event_ruleAWS-source events are free; custom events bill per million.
EventBridge
aws_cloudwatch_event_targetIAM
aws_iam_policyIAM
aws_iam_policy_attachmentIAM
aws_iam_roleIAM
aws_iam_role_policy_attachment