659 GB Through a NAT Gateway: The Idle Bedrock Agent That Ate $29
An idle voice agent on Bedrock AgentCore Runtime racked up 659 GB of inbound NAT Gateway traffic in six days — costing $29. Turns out, it's not WebRTC; it's relentless S3 pulls for warm pool VMs.
⚡ Key Takeaways
- Bedrock AgentCore's warm pool triggers massive S3 image pulls via NAT Gateway, even when idle — 659 GB in 6 days cost $29.
- Fix instantly with a free S3 Gateway VPC Endpoint; mandate it for all private VPCs.
- Architectural insight: AI agent low-latency demands hidden cloud cost traps — trim images, add endpoints proactively.
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Originally reported by dev.to
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