FabTally Valid MCP server
online · 100% uptimeValidation suite: EU VAT (VIES), IBAN mod-97, email (MX+disposable), geo place lookup, VIN decode.
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If you have run it, two minutes of your experience saves the next person an afternoon.
FabTally Valid tools (5, 1 write)
write = sends, deletes, buys or postsdecode_vinFreePAID $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_lookupFreePAID $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.
validate_emailwrite actionFreePAID $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_ibanFreePAID $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_vatFreePAID $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.
Public scan report
scanner v0.1.9 · 2026-09-24 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 1020ms20/20
- Tool poisoning5 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
- Maintenancelast push 54 days ago12/15
- Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
How FabTally Valid compares
Against every graded Email MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 77/100
- higher than 50% of 916 Email servers
- Tools
- 5
- the typical Email server has 7
- Tools that change things
- 20%
- typical: 25%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote Email server answers 100%
- Response time
- 365 ms
- faster than 43% of 609 Email servers
What its tools let an agent do: 4 read · 1 change
Install FabTally Valid in Claude Code, Cursor or VS Code
claude mcp add --transport http validation-suite https://valid.fabtally.com/mcp
What the publisher says
From the FabTally Valid repository's README, as published. We do not edit it. Read it on GitHub
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)
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: FABTALLYVALIDBASE (default https://valid.fabtally.com).
Read-only, keyless, stateless, non-PII. Operated by Sunstone Soft (fabtally.com). Not legal, tax, or financial advice.
Nothing above is checked by us. What we check is on the safety report.
FabTally Valid: common questions
- Is FabTally Valid MCP server safe?
- Mostly: it is graded B (77/100). Read the FabTally Valid safety report
- How do I install FabTally Valid?
- It runs remotely at valid.fabtally.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does FabTally Valid need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is FabTally Valid maintained?
- The last commit was 95 days ago (2026-08-01). The latest release is v1.0.0.
- Is FabTally Valid up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- What can I use instead of FabTally Valid?
- Servers from other publishers that do the same job: ParseAPI MCP server, Mailoo - Email MCP Server and emailmd MCP server.
- How does FabTally Valid compare with other Email MCP servers?
- safety score 77/100 (higher than 50% of 916 Email servers); tools 5 (the typical Email server has 7); tools that change things 20% (typical: 25%. Fewer write tools means less an agent can break). Full comparison.
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