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 norman-finance/norman-mcp-server --skill overdue-remindersgit clone --depth 1 https://github.com/norman-finance/norman-mcp-serverWrote 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/norman-finance/norman-mcp-server/overdue-reminders)<a href="https://agentmods.dev/skills/norman-finance/norman-mcp-server/overdue-reminders"><img src="https://agentmods.dev/badge/skills/norman-finance/norman-mcp-server/overdue-reminders/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/norman-finance/norman-mcp-server/overdue-reminders"><img src="https://agentmods.dev/badge/skills/norman-finance/norman-mcp-server/overdue-reminders.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 | $0.00048 | $0.00483 |
| Opus 5 | $0.00024 | $0.00242 |
| Sonnet 5 | $0.00010 | $0.00097 |
| Haiku 4.5 | $0.00005 | $0.00048 |
Grade A, and why
overdue-reminders 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 12d 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
Help the user manage overdue invoices and send payment reminders:
Step 1: Find overdue invoices
- Call
list_invoicesto get all invoices - Filter for invoices that are past their due date and still unpaid
- If
$ARGUMENTSspecifies a client name, filter to that client only - Present a summary table: Client, Invoice #, Amount, Due Date, Days Overdue
Step 2: Prioritize
Group overdue invoices by severity:
- Gentle reminder (1-14 days overdue): First reminder, friendly tone
- Second reminder (15-30 days overdue): Firmer tone, reference original due date
- Final notice (30+ days overdue): Urgent, mention potential consequences
Step 3: Review before sending
For each overdue invoice (or batch per client):
- Show the invoice details: amount, due date, days overdue
- Show the client's contact info from
get_client - Let the user decide whether to send a reminder or skip
Step 4: Send reminders
- Use
send_invoice_overdue_reminderfor each approved reminder - Wait for user confirmation before each send
Step 5: Summary
Present a final report:
- Total overdue amount across all clients
- Number of reminders sent
- Any invoices the user chose to skip (and why)
- Suggest scheduling a follow-up check in 7 days
Important:
- ALWAYS let the user review and approve each reminder before sending
- Never send reminders automatically without explicit confirmation
- In Germany, a Mahnung (formal dunning letter) has legal implications - make sure the user is aware
- Suggest checking if a payment was recently received but not yet linked (use
search_transactions)
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.
- 12d ago First seen · 52 lines · 48 tokens per session scan A a967379b27c8
overdue-reminders is a skill published in the GitHub repository norman-finance/norman-mcp-server (54 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 483 once invoked, about $0.0002 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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