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 iwebdevnl/exact-online-ai-connect --skill btw-aangifte-assistentgit clone --depth 1 https://github.com/iwebdevnl/exact-online-ai-connectWrote 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/iwebdevnl/exact-online-ai-connect/btw-aangifte-assistent)<a href="https://agentmods.dev/skills/iwebdevnl/exact-online-ai-connect/btw-aangifte-assistent"><img src="https://agentmods.dev/badge/skills/iwebdevnl/exact-online-ai-connect/btw-aangifte-assistent/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/iwebdevnl/exact-online-ai-connect/btw-aangifte-assistent"><img src="https://agentmods.dev/badge/skills/iwebdevnl/exact-online-ai-connect/btw-aangifte-assistent.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00128 | $0.03790 |
| Opus 5 | $0.00064 | $0.01895 |
| Sonnet 5 | $0.00026 | $0.00758 |
| Haiku 4.5 | $0.00013 | $0.00379 |
Grade A, and why
btw-aangifte-assistent 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 10d 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 — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BTW-aangifte Assistent
Controleer en bereid BTW-aangiftes voor in Exact Online. Deze skill helpt bij het opsporen van afwijkingen tussen boekingen en aangifte, zodat je met vertrouwen kunt indienen.
Waarom deze skill bestaat
De BTW-aangifte is een van de meest voorkomende foutbronnen in de boekhouding. Typische problemen: boekingen op verkeerde BTW-codes, vergeten facturen, ICP-leveringen niet correct gerapporteerd, afrondingsverschillen die oplopen, en openstaande boekingsvoorstellen die de aangifte beïnvloeden. Door systematisch te controleren voorkom je naheffingen en boetes.
Stap-voor-stap Workflow
Stap 1: Bepaal de BTW-periode
Vraag de gebruiker welke periode ze willen controleren als dit niet duidelijk is. Nederlandse BTW-aangifteperiodes:
- Maandelijks: Periode 1-12 (januari = 1, december = 12)
- Per kwartaal: Q1 = periode 1-3, Q2 = 4-6, Q3 = 7-9, Q4 = 10-12
- Jaarlijks: Periode 1-12
Bepaal ook het boekjaar (FinancialYear). Standaard is dit het huidige jaar, tenzij anders aangegeven.
In alle voorbeelden hieronder staat <jaar> voor dat boekjaar en staan <beginperiode> en
<eindperiode> voor de periodegrenzen. Vul die overal in, gebruik geen vast jaartal.
Stap 2: Haal de BTW-aangifte op
Gebruik het Returns endpoint om de ingediende of concept-aangifte op te halen.
Tool: read_operation (deze tool doet alleen GET en heeft geen operation-parameter)
{
"service": "Read",
"entity": "Returns",
"select": "DocumentID,Period,Year,Status,Amount,Description,Frequency,DueDate,Type"
}
Let op: Het Returns endpoint heeft beperkte velden. Beschikbare velden zijn: DocumentID, Amount, Created, Currency, Description, DocumentViewUrl, DueDate, Frequency, Period, PeriodDescription, Status, Subject, Type, Year.
NIET beschikbaar: TotalRevenue, TotalVATDue, TotalVATDeductible, ReportingFrequency.
Status-waarden: de volledige reeks die op Returns voorkomt is -10, 0, 5, 10, 20, 30, 40, 50. Vastgelegde betekenis: 10 = Concept, 20 = Open, 30 = Approved, 40 = Realized, 50 = Verwerkt (Processed). Van -10, 0 en 5 is de betekenis niet betrouwbaar vastgelegd: toon de ruwe waarde en trek er geen conclusie uit.
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.
- 10d ago First seen · 306 lines · 128 tokens per session scan A e3d25f5ffad4
btw-aangifte-assistent is a skill published in the GitHub repository iwebdevnl/exact-online-ai-connect (0 stars, last pushed 1mo ago), licensed MIT. It adds 128 tokens to every session and 3,790 once invoked, about $0.0006 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 2026-08-31.
Other skills, from other repositories
erpclaw
AI-native ERP system. Full accounting, invoicing, inventory, purchasing, tax, billing, HR, payroll, advanced accounting (ASC 606/842, intercompany, consolidation), and financial reporting (including P&L / trial balance / spend grouped by department, project, cost center, location, or fund). 496 actions across 14…
tax-calculator
Calculate tax implications of trades and generate tax reports.
jangbu-import
A data-import workflow for turning bank files, card records, spreadsheets, receipts, tax invoices, and statement PDFs into a standard set of 13 transaction fields. OCR, or optical character recognition, is used to read information from document images and PDFs.
jangbu-tax
A financial-reporting tool that summarizes categorized transactions into a profit-and-loss statement and a simplified balance sheet. A profit-and-loss statement covers income and expenses over a period; a balance sheet shows assets, liabilities, and equity at a date.
accountant-expert
Expert-level accounting, tax, financial reporting, and accounting systems. Use when the user mentions accounting, tax, financial reporting, GAAP, or IFRS, or when the task involves Accounting Principles, Financial Statements, Tax & Compliance, or Accounting Systems.
sap-co
This skill handles all SAP CO (Controlling) topics: cost center accounting, profit center accounting, internal orders, product costing, profitability analysis (CO-PA), assessment and distribution cycles, actual vs plan postings, settlement, and CO period-end closing. Use when user mentions CO, cost center, profit…