Cost

loomster carries no pricing data. For numbers, run Infracost against the synthesized templates (Estimate cost). This page lists what drives the bill.

Per tier

Resource	light	production	production-ha
ALB	one	one	one
Fargate tasks	backend 1, frontend	backend 1 and autoscaling, frontend	backend 2 and autoscaling, frontend
RDS	single-AZ	single-AZ and RDS Proxy	Multi-AZ and RDS Proxy, rotation function
PrivateLink	none	NLB and endpoint service	NLB and endpoint service
NAT or VPC endpoints	none (public subnets)	yours	yours
Route53 hosted zone	none	one, unless you reference yours	one, unless you reference yours
KMS keys	ECR and secrets keys	as light	as light
AgentCore	the assistant runtime and its memory	as light	as light

production-ha costs materially more than production: Multi-AZ RDS, two backend tasks and the rotation function on top of everything production has. A hosted zone is about $0.50 a month.

Usage-based

Outside any estimate of the templates, and growing with use:

• agent invocations: AgentCore Runtime time and model tokens;
• AgentCore Memory events and records;
• Evaluations, which invoke an agent and a model to score it;
• CloudWatch logs and the aws/spans log group Transaction Search writes;
• S3 artifacts and ECR images, including old versions.

Seeding and claims

• The demo seed profile, the default on light, deploys an agent, creates a memory, invokes the agent and runs an evaluation. On a live account all of that is billable. foundation, the production tiers’ default, creates nothing billable (Screens).
• AWS claims refuse to run unless an AWS Budgets budget alerts at $10 or less (LOOM_CLAIMS_ALERT_USD) and this month’s spend is under $25 (LOOM_CLAIMS_SPEND_CAP_USD), and they delete what they create afterwards (Claims).

After a teardown

loom-teardown leaves the RDS final snapshot, the versioned artifact bucket and the ECR repositories, which keep costing storage until you delete them. Per-agent role stacks cost nothing; a hosted zone from loom-dns-setup keeps its monthly charge (Tear down a deployment).

Keeping a tutorial cheap

Use the light tier, seed with foundation, and tear down when you’re done. The local stack on Floci costs nothing (Run Loom locally).