Aether Layer: EU VAT number validation (VIES)

com.aether-layer/eu-vat-validateVersion 0.3.1

Validates EU VAT numbers: local format/checksum for 27 states + XI, then VIES (cached 24 h).

Status

Responds115 msNov 14, 2026, 13:45 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:45 UTC
Latency: 115 ms
Remotes responding: 1 of 1
Sign-in: API key
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://aether-layer.com/api/mcp?src=mcpregResponds115 msNov 14, 2026, 13:45 UTC

No sign-in

Claude Code

claude mcp add --transport http eu-vat-validate 'https://aether-layer.com/api/mcp?src=mcpreg' --header 'X-Api-Key: <YOUR_X_API_KEY>'

Replace <YOUR_X_API_KEY> before running.

Claude Desktop and claude.ai

Settings > Connectors > Add custom connector
Name: eu-vat-validate
Remote MCP server URL: https://aether-layer.com/api/mcp?src=mcpreg
This server expects the header X-Api-Key.

Cursor

{
  "mcpServers": {
    "eu-vat-validate": {
      "url": "https://aether-layer.com/api/mcp?src=mcpreg",
      "headers": {
        "X-Api-Key": "<YOUR_X_API_KEY>"
      }
    }
  }
}

Replace <YOUR_X_API_KEY> before running.

VS Code

code --add-mcp '{"name":"eu-vat-validate","type":"http","url":"https://aether-layer.com/api/mcp?src=mcpreg","headers":{"X-Api-Key":"<YOUR_X_API_KEY>"}}'

Replace <YOUR_X_API_KEY> before running.

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Tools

2 tools

Tools of Aether Layer: EU VAT number validation (VIES)
	Description		Read-only	Idempotent	Open world
`agent_readiness_check`Deterministically grade an MCP tool catalog or a third-party x402 endpoint. Provide exactly one of: mcp_url (public https MCP server; initialize + tools/list), x402_url (public https resource; the gateway requests it WITHOUT an X-PAYMENT header and reads the 402), or tools (a JSON tool manifest). Never pays or signs a payment. No LLM is used. Requires an API key in Authorization: Bearer or X-Api-Key.	Deterministically grade an MCP tool catalog or a third-party x402 endpoint. Provide exactly one of: mcp_url (public https MCP server; initialize + tools/list), x402_url (public https resource; the gateway requests it WITHOUT an X-PAYMENT header and reads the 402), or tools (a JSON tool manifest). Never pays or signs a payment. No LLM is used. Requires an API key in Authorization: Bearer or X-Api-Key.	No	Yes	Yes	Yes
`validate_vat`Validate an EU VAT number (27 member states + XI Northern Ireland). Normalizes the input, checks the national format and checksum locally, then queries VIES (European Commission) live with limited retries. status: valid \| invalid (local checksum/format failed, or VIES answered valid=false) \| unverified_ms_down (the member state system is down) \| unverified. Results are cached across instances to respect VIES rules: valid/invalid 24 h, unverified 10 min; checked_at = time of the original VIES check, cache_age_s = its age in seconds. Never returns invalid because VIES is unavailable. The VIES name/address are never returned: pass your own name and/or address to get name_match / address_match booleans, computed locally (not sent to VIES; null when VIES has no data). Requires an API key in Authorization: Bearer or X-Api-Key. Controllo automatico: regole locali di formato e checksum più una consultazione live del VIES (Commissione europea). Non è un'attestazione fiscale né una consulenza legale; i dati VIES provengono dalle banche dati degli Stati membri. Conserva una tua traccia della consultazione VIES. / Automated check: local format/checksum rules plus a live query of VIES (European Commission). Not a tax attestation and not legal advice; VIES data come from the member states' databases. Keep your own record of the VIES consultation. / Automatische Prüfung: lokale Format- und Prüfziffernregeln plus eine Live-Abfrage von VIES (Europäische Kommission). Keine steuerliche Bescheinigung und keine Rechtsberatung; die VIES-Daten stammen aus den Datenbanken der Mitgliedstaaten. Bewahren Sie einen eigenen Nachweis der VIES-Abfrage auf.	Validate an EU VAT number (27 member states + XI Northern Ireland). Normalizes the input, checks the national format and checksum locally, then queries VIES (European Commission) live with limited retries. status: valid \| invalid (local checksum/format failed, or VIES answered valid=false) \| unverified_ms_down (the member state system is down) \| unverified. Results are cached across instances to respect VIES rules: valid/invalid 24 h, unverified 10 min; checked_at = time of the original VIES check, cache_age_s = its age in seconds. Never returns invalid because VIES is unavailable. The VIES name/address are never returned: pass your own name and/or address to get name_match / address_match booleans, computed locally (not sent to VIES; null when VIES has no data). Requires an API key in Authorization: Bearer or X-Api-Key. Controllo automatico: regole locali di formato e checksum più una consultazione live del VIES (Commissione europea). Non è un'attestazione fiscale né una consulenza legale; i dati VIES provengono dalle banche dati degli Stati membri. Conserva una tua traccia della consultazione VIES. / Automated check: local format/checksum rules plus a live query of VIES (European Commission). Not a tax attestation and not legal advice; VIES data come from the member states' databases. Keep your own record of the VIES consultation. / Automatische Prüfung: lokale Format- und Prüfziffernregeln plus eine Live-Abfrage von VIES (Europäische Kommission). Keine steuerliche Bescheinigung und keine Rechtsberatung; die VIES-Daten stammen aus den Datenbanken der Mitgliedstaaten. Bewahren Sie einen eigenen Nachweis der VIES-Abfrage auf.	No	Yes	Yes	Yes

Details

Registry status: Active
Published: Nov 13, 2026
Updated: Nov 13, 2026
Website: https://aether-layer.com/en/vat-api⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Invoicing and accountingSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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