check_vat_number
shallowapp.openkrill/eu-business · Verify this server
Use this when the user asks to validate a VAT number, check a tax ID, or confirm a supplier number for a reverse-charge invoice, for example "is ES A28015865 a valid VAT number?", "check the supplier VAT number on this invoice, ATU33864707" or "I need a VIES consultation number for this supplier". Pass the country code and the VAT number printed on the invoice or company letterhead, and requesterCountry with requesterVatNumber only when the user gives their own business VAT number for a consultation number. Returns whether the business is registered for VAT on the date of the check and, where the member state publishes it, the registered company name and address. Covers EU member states and Northern Ireland (XI), not GB. It only reads the public EU register of VAT-registered businesses; do not use it for VAT rates or to judge whether a business is trustworthy.
1 trials · measured 1 day ago
check_vat_number scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against app.openkrill/eu-business, measured 6 Oct 2026 under methodology v0.2.0. Every measured component scored 100.
Component breakdown
| Component | Weight | Value |
|---|---|---|
| Reliability | 35% | not applicable |
| Schema integrity | 25% | 100.0 |
| Failure behaviour | 15% | not applicable |
| Latency | 15% | not applicable |
| Concurrency | 10% | not applicable |
Tool details
- Transport
- remote
- Credential class
- self-provisionable
- Input schema
- not declared
- Output schema
- not declared
- Side-effect classification
- unclassified
Score history
| Day | Score | Tier | Methodology |
|---|---|---|---|
| 2026-10-06 | 100.0 | shallow | v0.2.0 |
Probe evidence
| Probe | Outcomes |
|---|---|
| schema_integrity | pass: 1 |
Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.
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