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 skills add theYahia/WWmcp --skill invoice-housekeepinggit clone --depth 1 https://github.com/theYahia/WWmcpWrote 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/skills/theyahia/wwmcp/invoice-housekeeping)<a href="https://agentmods.dev/skills/theyahia/wwmcp/invoice-housekeeping"><img src="https://agentmods.dev/badge/skills/theyahia/wwmcp/invoice-housekeeping/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/theyahia/wwmcp/invoice-housekeeping"><img src="https://agentmods.dev/badge/skills/theyahia/wwmcp/invoice-housekeeping.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00022 | $0.00466 |
| Opus 5 | $0.00011 | $0.00233 |
| Sonnet 5 | $0.00004 | $0.00093 |
| Haiku 4.5 | $0.00002 | $0.00047 |
Grade A, and why
invoice-housekeeping 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 6d 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.
What it actually says
/invoice-housekeeping — Invoice cleanup and refunds
Algorithm
- Call
list_invoiceswith page, per_page and status (paid | unpaid | expired | cancelled). Start with unpaid to find stale checkouts. - Page through until the list is exhausted. Do not report a total you have not paged to.
- For anything ambiguous, call
get_invoice_datawith its invoice_id for the full record (amount, method, transaction_id, customer). - To cancel:
cancel_invoicewith invoice_id. This only works on unpaid invoices — check status first, and confirm with the user before cancelling anything. - To refund:
refund_paymentwith invoice_id, optional amount (omit for full refund) and optional reason. Refund support depends on the rail — a Fawry cash payment may not be refundable through the API. Report the error as-is rather than retrying blindly. - Call
get_balanceat the end so the user sees the account position after the cleanup.
Response format
## Fawaterak housekeeping
**Balance**: 18,420 EGP
### Unpaid over 48 h — 6 invoices, 3,100 EGP
| Invoice | Amount | Created | Action |
|---------|--------|---------|--------|
| 88101 | 450 EGP | 2026-08-30 | cancelled |
### Refunds issued
| Invoice | Amount | Reason | Status |
|---------|--------|--------|--------|
| 88044 | 200 EGP | partial return | success |
Notes
- Always confirm before
cancel_invoiceorrefund_payment— neither is reversible. - Partial refund = pass amount. Full refund = omit amount entirely.
get_balancereflects settled money; a just-issued refund may not be deducted yet.
Examples
/invoice-housekeeping unpaid
/invoice-housekeeping refund 88044 200 "partial return"
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.
- 6d ago First seen · 53 lines · 22 tokens per session scan A 91d58e34808e
invoice-housekeeping is a skill published in the GitHub repository theYahia/WWmcp (29 stars, last pushed 5d ago), licensed MIT. It adds 22 tokens to every session and 466 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 2026-09-06.
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