Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add commands/armanzeroeight/fastagent-plugins/estimate-costgit clone --depth 1 https://github.com/armanzeroeight/fastagent-pluginsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/armanzeroeight/fastagent-plugins/estimate-cost)<a href="https://agentmods.dev/commands/armanzeroeight/fastagent-plugins/estimate-cost"><img src="https://agentmods.dev/badge/commands/armanzeroeight/fastagent-plugins/estimate-cost.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00010 | $0.01317 |
| Opus 5 | $0.00005 | $0.00659 |
| Sonnet 5 | $0.00002 | $0.00263 |
| Haiku 4.5 | $0.00001 | $0.00132 |
Grade A, and why
estimate-cost scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Estimate AWS Cost
Estimate costs for AWS infrastructure based on resource specifications.
Your Task
Provide cost estimates for AWS resources based on specifications.
Arguments
$1: Resource specifications (inline or file path)
Steps
-
Parse resource specifications:
Expected format:
region: us-east-1 resources: - type: ec2 instance_type: t3.medium count: 2 hours_per_month: 730 - type: rds instance_type: db.t3.small engine: postgres storage_gb: 100 - type: s3 storage_gb: 1000 requests_per_month: 1000000 -
Calculate costs by service:
EC2 pricing (us-east-1, approximate):
- t3.micro: $0.0104/hour (~$7.50/month)
- t3.small: $0.0208/hour (~$15/month)
- t3.medium: $0.0416/hour (~$30/month)
- t3.large: $0.0832/hour (~$60/month)
- m5.large: $0.096/hour (~$70/month)
- m5.xlarge: $0.192/hour (~$140/month)
Reserved Instance savings:
- 1-year: ~30-40% discount
- 3-year: ~50-60% discount
RDS pricing (us-east-1, approximate):
- db.t3.micro: $0.017/hour (~$12/month)
- db.t3.small: $0.034/hour (~$25/month)
- db.t3.medium: $0.068/hour (~$50/month)
- Storage: $0.115/GB-month (gp2)
- Backup storage: $0.095/GB-month
S3 pricing:
- Standard storage: $0.023/GB-month (first 50 TB)
- Standard-IA: $0.0125/GB-month
- Glacier: $0.004/GB-month
- PUT requests: $0.005 per 1,000
- GET requests: $0.0004 per 1,000
Data transfer:
- Out to internet: $0.09/GB (first 10 TB)
- Between regions: $0.02/GB
- CloudFront: $0.085/GB (first 10 TB)
Lambda:
- $0.20 per 1M requests
- $0.0000166667 per GB-second
DynamoDB:
- On-demand: $1.25 per million write requests, $0.25 per million read requests
- Provisioned: $0.00065 per WCU-hour, $0.00013 per RCU-hour
- Storage: $0.25/GB-month
-
Calculate total monthly cost:
EC2: 2 × t3.medium × $30 = $60 RDS: 1 × db.t3.small × $25 = $25 RDS Storage: 100 GB × $0.115 = $11.50 S3 Storage: 1000 GB × $0.023 = $23 S3 Requests: 1M × $0.005 = $5 Total: $124.50/month
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 174 lines · 10 tokens per session scan A e996823cd6fa
estimate-cost is a command published in the GitHub repository armanzeroeight/fastagent-plugins (29 stars, last pushed 1mo ago), licensed MIT. It adds 10 tokens to every session and 1,317 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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