Find your wasted AWS spend in 2 minutes

#!/usr/bin/env bash
# CloudBudgetMaster — free AWS waste finder (read-only; nothing leaves your machine)
# Requires the AWS CLI, configured with read access. Run:  bash waste-finder.sh
set -uo pipefail
REGION="${AWS_REGION:-us-east-1}"
echo "Scanning AWS ($REGION) — read-only..."

echo -e "\n== Unattached EBS volumes (billed while 'available') =="
aws ec2 describe-volumes --filters Name=status,Values=available --region "$REGION" \
  --query 'Volumes[].{Volume:VolumeId,GiB:Size,Type:VolumeType}' --output table

echo -e "\n== Unassociated Elastic IPs (~\$3.65/mo each) =="
aws ec2 describe-addresses --region "$REGION" \
  --query 'Addresses[?AssociationId==`null`].{IP:PublicIp,Alloc:AllocationId}' --output table

echo -e "\n== Stopped EC2 (you still pay for attached EBS) =="
aws ec2 describe-instances --filters Name=instance-state-name,Values=stopped --region "$REGION" \
  --query 'Reservations[].Instances[].{Instance:InstanceId,Type:InstanceType}' --output table

echo -e "\n== RDS with 0 connections in the last 24h (likely idle) =="
for db in $(aws rds describe-db-instances --region "$REGION" --query 'DBInstances[].DBInstanceIdentifier' --output text); do
  sum=$(aws cloudwatch get-metric-statistics --region "$REGION" --namespace AWS/RDS \
    --metric-name DatabaseConnections --dimensions Name=DBInstanceIdentifier,Value="$db" \
    --start-time "$(date -u -d '1 day ago' +%Y-%m-%dT%H:%M:%S 2>/dev/null || date -u -v-1d +%Y-%m-%dT%H:%M:%S)" \
    --end-time "$(date -u +%Y-%m-%dT%H:%M:%S)" --period 86400 --statistics Sum \
    --query 'Datapoints[0].Sum' --output text 2>/dev/null)
  [ "$sum" = "0.0" ] || [ "$sum" = "None" ] && echo "  IDLE: $db"
done

echo -e "\nDone. Want this automatically + the exact \$/month, tracked over time?"
echo "→ https://cloudbudgetmaster.com (free, read-only)"