FabTally Valid MCP Server

by zvmzaretsky Your server? Claim it

answering

FabTally Valid is answering right now. Last checked 10 min ago. It exposes 5 tools. Last commit 1 Aug 2026.

Validation suite: EU VAT (VIES), IBAN mod-97, email (MX+disposable), geo place lookup, VIN decode.

Uptime history 90 days of history · worst day 98%

90 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

142 ms

Response time

average over 24h

Stars

last commit 1 Aug 2026

Nothing serious here today

Today is the operative word: we check FabTally Valid every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add validation-suite --transport http https://valid.fabtally.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://valid.fabtally.com/mcp

~/.codex/config.toml

[mcp_servers.validation-suite]
url = "https://valid.fabtally.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "validation-suite": {
      "url": "https://valid.fabtally.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "validation-suite": {
      "type": "http",
      "url": "https://valid.fabtally.com/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

validate

validate_email

PAID $0.002 (x402, USDC on Base). Validate an email address: give {email} and get RFC-ish syntax validation, a LIVE MX-record (DNS) existence check, disposable/throwaway-domain detection (bundled blocklist), and a role-address flag (info@, admin@…). STATELESS and non-PII — the address is never stored and no SMTP mailbox is probed. Without payment returns the x402 challenge; pass x_payment to settle.

validate_iban

PAID $0.001 (x402, USDC on Base). Validate an IBAN: give {iban} and get ISO 13616 length + mod-97 checksum validation, the country, the human-formatted grouping, and the bank identifier (e.g. German Bankleitzahl, UK bank code + sort code) extracted from the BBAN where derivable. Pure-offline. Without payment returns the x402 challenge.

validate_vat

PAID $0.003 (x402, USDC on Base). FLAGSHIP. Validate an EU/EEA VAT number: give {country_code, vat_number} and get a per-country format + checksum pre-check AND a LIVE lookup against the official VIES service — returning valid/registered plus the registered company name & address when VIES provides them (cached ~1h to shield the flaky VIES). Without payment returns the x402 challenge; pass x_payment to settle.

decode

decode_vin

PAID $0.002 (x402, USDC on Base). Decode a Vehicle Identification Number: give {vin} and get a 17-char format + North-American check-digit validation and a full decode via NHTSA's public vPIC API — make, model, year, body class, engine, plant country and more. VIN-only (never plate→owner). Without payment returns the x402 challenge; pass x_payment to settle.

geo

geo_lookup

PAID $0.002 (x402, USDC on Base). Resolve a place against a bundled open dataset (no per-day API limits). Give {query:"Munich, Bavaria, Germany"} OR {country, state, city} and get normalized names, ISO 3166-1/-2 codes, the country→subdivision→city hierarchy, population and coordinates, and confirmation the place exists. Without payment returns the x402 challenge; pass x_payment to settle.

Endpoints

URL	Transport	State	Latency	Checked
https://valid.fabtally.com/mcp	streamable-http	answering	185 ms	10 min ago

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FabTally Valid — questions

Answers built from our own checks of this server.

What can FabTally Valid do?

It exposes 5 tools, read directly from the server on our last check. Among them: decode_vin, geo_lookup, validate_email, validate_iban, validate_vat. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is FabTally Valid working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 142 ms. The bar chart above shows every period we have measured.

How do I connect FabTally Valid?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does FabTally Valid need an API key?

No. FabTally Valid completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is FabTally Valid?

It answers our handshake in 142 ms on average, which is faster than 84% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is FabTally Valid open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 0 stars on GitHub and 2 open issues. The licence covers the code in the repository, not the hosted service at valid.fabtally.com, which runs on its operator's own terms.