io.github.zvmzaretsky/validation-suite Model Context Protocol (MCP) Server

This MCP server provides a validation suite covering multiple common checks: EU VAT validation via VIES, IBAN modulus-97 verification, email validation that includes checks for MX records and disposable domains, geo place lookup, and VIN decoding.

🛠️ Key Features

EU VAT (VIES) validation
IBAN mod-97 check
Email validation (MX + disposable detection)
Geo place lookup
VIN decode

🚀 Use Cases

Validate EU VAT identifiers using VIES
Verify IBAN numbers with mod-97 arithmetic
Determine whether an email domain is disposable and assess MX records
Look up geographic place information
Decode VIN strings for vehicle-related data extraction

⚡ Developer Benefits

Centralizes multiple validation and decoding capabilities under one server
Focused set of tools aligned to VAT, banking, email, geodata, and VIN processing

⚠️ Limitations

Scope is limited to the listed checks: VIES, IBAN mod-97, MX/disposable email validation, geo place lookup, and VIN decoding

FabTally Valid — MCP server

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.

Tools (all paid; a call with no payment returns the decoded x402 402 challenge)

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.

Transports

stdio (portable): npx fabtally-valid-mcp (bin: fabtally-valid-mcp)
streamable-http (hosted): https://valid.fabtally.com/mcp

Config: 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.

FabTally Valid

io.github.zvmzaretsky/validation-suite Model Context Protocol (MCP) Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

validate_vat

validate_iban

validate_email

geo_lookup

decode_vin

FabTally Valid — MCP server

Tools (all paid; a call with no payment returns the decoded x402 402 challenge)

Transports

Install

Remote endpoint

country_code	string	required	2-letter EU VAT country code (e.g. IE, DE, FR; GB/XI for Northern Ireland; GR accepted as EL).
vat_number	string	required	The VAT number without the country prefix (prefix is tolerated and stripped).
x_payment	string	optional	x402 payment payload (base64) for this PAID validation. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

iban	string	required	The IBAN (spaces/dashes tolerated), e.g. DE89 3704 0044 0532 0130 00.
x_payment	string	optional	x402 payment payload (base64) for this PAID validation. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

email	string	required	The email address to validate.
x_payment	string	optional	x402 payment payload (base64) for this PAID validation. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

query	string	optional	Free-text place, e.g. "Munich, Bavaria, Germany" or "France".
country	string	optional	Country name or ISO 3166-1 alpha-2/alpha-3 code.
state	string	optional	State/province/subdivision name or code (within the country).
city	string	optional	City name.
x_payment	string	optional	x402 payment payload (base64) for this PAID validation. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.

vin	string	required	A 17-character Vehicle Identification Number (excludes I, O, Q).
x_payment	string	optional	x402 payment payload (base64) for this PAID validation. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first.