Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Veridigit
Overview
Description from the maker (original English)
Verified IBAN, card, ISBN-13 & VIN validation for AI agents — checksums, not guesses.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs on your computer
- Transport: stdio
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
You need
- npmNode.js installed (for the npx command)
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"veridigit": {
"command": "npx",
"args": [
"-y",
"veridigit"
]
}
}
}Run this in your terminal
claude mcp add veridigit -- npx -y veridigitOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"veridigit": {
"command": "npx",
"args": [
"-y",
"veridigit"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"veridigit": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"veridigit"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account qinisolabs, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Otheri
- More stars than 0% of the other 18333 servers in this category
- Published to the registry more recently than 11% of the other 18333 servers in this category
- Basic checks equal to or better than 100% of the other 18333 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Veridigit safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 5 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Signoff
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated 2 days ago
Install
Signoff
by ayuanxx-max
Five gates that make an agent's 'done' provable: run them, read the verdict, audit the record.
Runs on your computerUpdated today
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
veridigit
Verified validation of structured identifiers for AI agents — checksums, not guesses.
LLMs cheerfully accept malformed IBANs, mistype card check digits, invent ISBN and VIN check digits, and guess a card's brand wrong. veridigit gives an agent a deterministic, authoritative answer instead: it runs the real checksum algorithms and returns structured results with the parsed parts and clear error reasons.
It ships as both an MCP server (for agents to call live) and a typed TypeScript library (for apps to import).
Supported in v1:
- IBAN — ISO 7064 mod-97 checksum + country-specific length, for 75+ countries.
- Payment cards — Luhn (ISO/IEC 7812) checksum, brand detection from the BIN (Visa, Mastercard, Amex, Discover, Diners, JCB, UnionPay), and length rules.
- ISBN-13 — 978/979 prefix and mod-10 weighted check digit.
- VIN — ISO 3779 alphabet (no I/O/Q) and the position-9 transliteration check digit.
Why
On 32 randomly generated, non-memorised identifiers, a frontier model with no tool got the check digit wrong 91% of the time — IBAN 100%, VIN 100%, ISBN-13 88%, card/Luhn 75% — versus 0% for veridigit. The failure is invisible: the model returns a confident, well-formatted answer that happens to be wrong. veridigit replaces the guess with the algorithm.
Benchmark and reproducible harness: https://qinisolabs.github.io/veridigit
The 91% figure is one frontier model, tool-free, at temperature 0. Run it on any model
yourself with the harness in
bench/.
Use as an MCP server
// in your MCP client config{ "mcpServers": { "veridigit": { "command": "npx", "args": ["-y", "veridigit"] } } }
Tools exposed: validate_iban, validate_card, validate_isbn, validate_vin.
Use as a library
npm install veridigitimport { validateIban, validateCard, validateIsbn13, validateVin } from "veridigit";validateIban("GB82 WEST 1234 5698 7654 32"); // { valid: true, countryCode: "GB", country: "United Kingdom", checkDigits: "82", ... }
validateCard("4111 1111 1111 1111"); // { valid: true, luhnValid: true, brand: "Visa", lengthValid: true, ... }
validateIsbn13("978-0-306-40615-7"); // { valid: true, type: "ISBN-13", checkDigit: "7", ... } validateVin("1HGCM82633A004352"); // { valid: true, checkDigit: "3", ... }
Helper exports are also available: ibanCheckDigits, luhnValid, luhnCheckDigit, detectBrand, isbn13CheckDigit, vinCheckDigit, supportedIbanCountries.
Scope
veridigit validates the structure of an identifier — its format and checksum. It does not confirm that a bank account, card, book or vehicle actually exists, is active, or belongs to anyone. It performs no network calls.
Development
npm installnpm run build # tsc -> dist/ npm test # parity/known-answer tests via tsx
The curated reference data (IBAN country specs, card BIN ranges) lives in data/.
License
Apache-2.0