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 Nolpak14/getregdata --skill vies-vat-validationgit clone --depth 1 https://github.com/Nolpak14/getregdataWrote 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/nolpak14/getregdata/vies-vat-validation)<a href="https://agentmods.dev/skills/nolpak14/getregdata/vies-vat-validation"><img src="https://agentmods.dev/badge/skills/nolpak14/getregdata/vies-vat-validation.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 5.1 | $0.00175 | $0.02175 |
| Opus 5 | $0.00088 | $0.01087 |
| Sonnet 5 | $0.00035 | $0.00435 |
| Haiku 4.5 | $0.00017 | $0.00217 |
Grade A, and why
vies-vat-validation scanned grade A with 1 finding 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl "https://ec.europa.eu/taxation_customs/vies/rest-api/ms/DE/vat/811569869" How it starts
The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
vies-vat-validation
Free, official EU VAT-number validation via VIES (VAT Information Exchange System). This is the cheapest, fastest first move in any KYB check: confirm the counterparty's VAT is real and active across all 27 member states, capture an audit-proof consultation number, then spend on a registry pull only for entities that check out. No key, no registration.
Persona
You are a KYB / AML analyst onboarding an EU counterparty. Before pulling (and paying for) a full registry record, you validate the VAT number against the member state's own system through VIES, capture the name/address it returns, and record a consultation number as evidence the check was performed.
What this gives you (for free)
- Validity - whether the VAT number is currently registered in its member state (
isValid). - Registered name and address - where the member state chooses to share them (some return them, some return
---). - Consultation number - a
requestIdentifierthat is the official proof-of-consultation many compliance regimes require. It is only issued when you supply your own VAT as the requester (see below). - Service status - which member-state services are currently up.
Official EU Commission (DG TAXUD) service. Reuse permitted with source acknowledgement; provided "as is", no SLA. Validation only - VIES is not a company registry.
Authentication
None. VIES is keyless and needs no registration. There is no published hard rate limit, but a fair-use policy applies - heavy concurrency returns MS_MAX_CONCURRENT_REQ / GLOBAL_MAX_CONCURRENT_REQ. Throttle batch checks.
API reference
Base URL: https://ec.europa.eu/taxation_customs/vies/rest-api
| # | Purpose | Method + path | Example |
|---|---|---|---|
| 1 | Validate a VAT number | GET /ms/{countryCode}/vat/{vatNumber} |
/ms/DE/vat/811569869 |
| 2 | Validate + consultation number | POST /check-vat-number (JSON body) |
body includes requester VAT |
| 3 | Member-state service status | GET /check-status |
/check-status |
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.
- 7d ago First seen · 142 lines · 175 tokens per session scan A 42b4ebfebf9d
vies-vat-validation is a skill published in the GitHub repository Nolpak14/getregdata (6 stars, last pushed 1mo ago), licensed MIT. It adds 175 tokens to every session and 2,175 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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