The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the FabTally Valid listing page.
A developer validation suite — the per-call utilities incumbents charge for (Vatstack $0.01–0.09/call) or lock behind subscriptions, unified. Fronts the Valid HTTP API at https://valid.fabtally.com. Holds no private key.
| Tool | Price | What it does |
|---|---|---|
validate_vat | $0.003 | Flagship. EU/EEA VAT: {country_code, vat_number} → per-country format + checksum pre-check AND a live VIES lookup, returning valid/registered plus the registered company name & address when VIES has them (cached ~1h to shield the flaky VIES). |
validate_iban | $0.001 | {iban} → ISO 13616 length + mod-97 checksum, country, human-formatted grouping, and bank identifier (German Bankleitzahl, UK bank code + sort code, …) extracted from the BBAN where derivable. Pure-offline. |
validate_email | $0.002 | {email} → RFC-ish syntax + live MX-record (DNS) existence + disposable/throwaway-domain detection (bundled blocklist) + role-address flag (info@, admin@). Stateless & non-PII: the address is never stored and no SMTP mailbox is probed. |
geo_lookup | $0.002 | {query:"Munich, Bavaria, Germany"} or {country,state,city} → normalized names, ISO 3166-1/-2 codes, country→subdivision→city hierarchy, population and coordinates, over a bundled open dataset (no per-day API limits). |
decode_vin | $0.002 | {vin} → 17-char format + North-American check-digit validation and a full NHTSA vPIC decode: make, model, year, body class, engine, plant country. VIN-only (never plate→owner). |
Every tool also accepts an optional x_payment (base64 x402 payload) that is
forwarded as the X-PAYMENT header to settle the call and return the real result.
Humans can instead prepay by card and use an X-FabTally-Key credit key against
the HTTP API.
npx fabtally-valid-mcp (bin: fabtally-valid-mcp)https://valid.fabtally.com/mcpConfig: FABTALLY_VALID_BASE (default https://valid.fabtally.com).
Read-only, keyless, stateless, non-PII. Operated by Sunstone Soft (fabtally.com). Not legal, tax, or financial advice.