Cost Check

Cost Check Skill

Report infrastructure cost, plan, quota, and expiry risks.

Contract

• Inputs: optional domain list or service filter.
• Output: a Polish cost and expiry report with alerts.
• Side effects: none. Do not change billing plans, renew domains, rotate secrets, or cancel services.

Known Services

> Configure for your project. Maintain the list of services below in .claude/memory/reference_.md (or equivalent) and reference it from here.

| Service | Identifier | |---|---| | Hosting (e.g. Netlify/Vercel) primary | `, site ID | | Hosting secondary (if any) | , site ID | | Database (e.g. Supabase/Postgres) | project ref / connection string | | Domains | , `, plus any domains in hosting |

Workflow

1. Check Netlify

Use Netlify MCP when available:

• project/service lookup for both known sites
• latest deploy status
• plan/team information if exposed
• domain list and SSL status

If MCP is unavailable, use Netlify CLI/API only if already authenticated. Do not request or print tokens.

2. Check Supabase

test -f supabase/.temp/project-ref && cat supabase/.temp/project-ref
if command -v supabase >/dev/null 2>&1; then
  supabase projects list
else
  npx supabase projects list
fi

If Supabase CLI is not authenticated, report that billing/quota status was not checked.

3. Check domains and SSL

Use the safest available command:

openssl s_client -servername  -connect :443 /dev/null | openssl x509 -noout -dates
openssl s_client -servername  -connect :443 /dev/null | openssl x509 -noout -dates

For registrar expiry, use whois if available:

whois 
whois 

If WHOIS is unavailable or redacted, say so and rely on Netlify/registrar data supplied by the user.

4. Check API cost risks

Look for AI/API usage points:

rg -n "OPENAI|ANTHROPIC|GEMINI|GOOGLE|AI_GATEWAY|generate-quiz|chat-with-ai|rate-limit" supabase src netlify .env.example

Report whether rate limiting exists before expensive calls. Look for guards such as rate-limit, throttle, quota, or model-strategy in your backend / serverless functions / API routes.

5. Output

## Cost check

**Checked at:** YYYY-MM-DD HH:mm Europe/Warsaw
**Verdict:** ok / watch / action needed

### Alerts
| Severity | Service | Finding | Action |
|---|---|---|---|

### Netlify
- Primary: ...
- Secondary: ...

### Supabase
- Project: ...
- Plan/quota: checked / unavailable

### Domains and SSL
| Domain | DNS/SSL | Registrar expiry | Notes |
|---|---|---|---|

### API cost risk
- ...

Rules

• Never paste secrets, auth tokens, API keys, or billing card details.
• Never change paid plans automatically.
• Treat expiry within 30 days as action needed; within 60 days as watch.
• If a source cannot be checked, report it as unknown rather than guessing.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: ZroZoom
• Source: ZroZoom/agent-skills-core
• License: MIT

Install and usage instructions live in the source repository linked above.