aws-cost-optimizer

Analyze AWS costs, find waste, and recommend optimizations using read-only MCP tools

Repository: firstbatchxyz/kai
Last source activity: June 19, 2026 at 14:08
Detected SKILL.md language: English
Stars: 2
Forks: 0

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Unused EBS volumes (easy win):
```
aws_ec2_unused_volumes(workspaceId)
```
Each unattached volume costs money. Calculate: size_gb * $0.10/month
Unattached Elastic IPs:
```
aws_ec2_unattached_eips(workspaceId)
```
Each costs ~$3.65/month

Idle EC2 instances (biggest savings potential):

aws_ec2_list_instances(workspaceId, state="running")

Then for each instance, check CPU over 7 days:

aws_cloudwatch_get_metrics(
  workspaceId, namespace="AWS/EC2", metricName="CPUUtilization",
  dimensions=[{"name":"InstanceId","value":"i-xxx"}],
  startTime="-7d", endTime="now", period=3600, statistics=["Average"]
)

Flag instances with avg CPU < 10% as "idle — consider downsizing or stopping"
Flag instances with avg CPU < 2% as "likely unused — consider terminating"

Oversized Lambda functions:

aws_lambda_list_functions(workspaceId)

Then check actual duration vs configured memory:

aws_cloudwatch_get_metrics(
  workspaceId, namespace="AWS/Lambda", metricName="Duration",
  dimensions=[{"name":"FunctionName","value":"xxx"}],
  startTime="-7d", endTime="now", period=86400, statistics=["Average","Maximum"]
)

If avg duration < 100ms but memory > 512MB, suggest reducing memory

RI coverage:
```
aws_reservation_coverage(workspaceId, startDate="-30d", endDate="today")
```
- Identify services running >80% on-demand
- Calculate potential savings with 1-year no-upfront RI

Savings Plans coverage:

aws_savings_plans_coverage(workspaceId, startDate="-30d", endDate="today")

Quantify uncovered spend

List all buckets:
```
aws_s3_list_buckets(workspaceId)
```
Analyze each significant bucket:
```
aws_s3_bucket_analysis(workspaceId, bucketName="xxx")
```
- Flag buckets without lifecycle rules (data never expires)
- Flag buckets without versioning cleanup (old versions accumulate)
- Recommend Intelligent-Tiering for infrequently accessed data

name	aws-cost-optimizer
description	Analyze AWS costs, find waste, and recommend optimizations using read-only MCP tools
version	1.0.0
author	kai-agent
metadata	{"kai":{"tags":["kai","aws","cost","optimization","finops"],"related_skills":["aws-performance"]}}

name	aws-cost-optimizer
description	Analyze AWS costs, find waste, and recommend optimizations using read-only MCP tools
version	1.0.0
author	kai-agent
metadata	{"kai":{"tags":["kai","aws","cost","optimization","finops"],"related_skills":["aws-performance"]}}

Finding	Service	Monthly Cost	Savings	Severity
5 unused EBS volumes	EC2	$50	$50	Low
3 idle instances (CPU <5%)	EC2	$450	$300	High
No lifecycle rules on logs bucket	S3	$200	$150	Medium

aws-cost-optimizer

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