Can Qiniso verify if a VAT number is registered and active?

No, it only validates the VAT number's checksum, not its registration status.

Is Qiniso a live data provider?

No, it verifies facts against checksums and curated data but does not provide live data.

How can I integrate Qiniso with AI agents?

Add Qiniso as a custom connector via its MCP endpoint URL without login or keys.

Can I use Qiniso as a local library?

Yes, it is available as an npm package with typed validation functions.

Qiniso

Deterministic verification of 56 structured fact types including IDs, codes, addresses, and dates using checksums and curated data.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Remote HTTP

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "qinisolabs-qiniso": {
      "url": "https://qiniso.qinisolabs.workers.dev/mcp"
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Overview

This server provides deterministic fact-checking tools for AI agents to verify structured data such as IBANs, VAT numbers, crypto addresses, phone numbers, and dates against authoritative checksums and curated reference data. It complements other guardrails by ensuring factual correctness rather than format or safety. The server is stateless, requires no authentication, and can be used via MCP or as a standalone TypeScript library.

Use cases

Validate financial identifiers like IBAN, ISIN, and payment cards

Verify national and tax IDs across multiple countries

Check crypto wallet addresses for correctness

Parse and validate phone numbers and dates globally

Confirm domain TLDs and email formats against authoritative data

Key features

56 deterministic validation tools across 8 domains

Checksum and curated data-based verification

Stateless MCP server with no secret or user data required

TypeScript library available for local integration

Supports validation of identifiers, finance, crypto, locale, and addresses

Capabilities & Tool Schemas

Inspect callable tools, capabilities, and parameters exposed to AI agents by Qiniso.

Extracted Tool Capabilities

56 deterministic validation tools across 8 domains

Checksum and curated data-based verification

Stateless MCP server with no secret or user data required

TypeScript library available for local integration

Supports validation of identifiers, finance, crypto, locale, and addresses

Documentation Overview

Qiniso

The deterministic fact-verification layer for AI agents.

Verified, trustworthy data tools for AI agents. "Qiniso" means "truth" in Zulu.

Website · npm · MCP endpoint · MCP Registry

Agents confidently emit IBANs, phone numbers, domains, VAT numbers and crypto addresses that are subtly — and silently — wrong. Qiniso checks the structured facts an agent produces against checksums and curated authoritative data, so a bad value is caught instead of trusted.

It's the deterministic complement to the guardrail stack: security guardrails check whether output is safe, structure guardrails check it's well-formed, and hallucination guardrails ask another LLM if it's faithful to the prompt. None of them check whether a structured fact is actually correct against the real world — because that needs computation or curated data, not another model's opinion. That's Qiniso.

On arbitrary identifiers, a frontier LLM validates them wrong ~91% of the time, cold and silently. Qiniso: 0%.

Add it to Claude

Settings → Connectors → Add custom connector, and paste — no login, no key:

Code

https://qiniso.qinisolabs.workers.dev/mcp

Stateless, reads no user data, requires no secrets.

Use it as a library

Every check is also a typed function — no MCP required:

Terminal

npm i @qinisolabs/qiniso

server.ts

import { validateIban, validateVat } from "@qinisolabs/qiniso";

validateIban("GB82 WEST 1234 5698 7654 32");
// { valid: true, country: "United Kingdom", ... }

What it verifies — 56 tools across 8 domains

Domain	Tools
Identifiers	IBAN, payment card (Luhn + brand), ISBN-13, VIN, GTIN/UPC/EAN barcodes (+ GS1 country)
Web / network	TLD & domain (IANA root zone), IP, UUID, URL, email
Finance	ISIN, CUSIP, SEDOL, LEI, US ABA routing
Crypto	Ethereum (EIP-55), Bitcoin (Base58Check / Bech32) addresses
National & tax IDs	Brazil CPF/CNPJ, South Africa ID, Spain DNI/NIE, India Aadhaar, Italy, Poland, Netherlands, Belgium, Nordics, Portugal, Turkey, China, Germany Steuer-IdNr, France NIR, Switzerland AHV, Mexico CURP, Croatia OIB, Romania CNP, Bulgaria EGN, Estonia, Czech/Slovak rodné číslo, EU/UK VAT
Academic	ISBN-10, ISSN, ORCID
Locale	Phone (global), date parsing, currency, holidays (~200 countries), UK VAT-by-date
Addresses	UK/US address parsing

Each tool wraps an authoritative method — a published checksum standard, an audited library (libphonenumber-js, jsvat, date-holidays, @noble/hashes), or curated reference data (the IANA root zone, UK VAT history).

What it is not

Not a live-data provider. It verifies facts you give it; it does not return the current time, weather, or live exchange rates.
Not a credential sink. It never asks for secrets or API keys. (For JWT signature verification, use a library in your own runtime so the secret never leaves your machine.)
Not a registration check. It validates a VAT number's checksum, not whether it is live-registered (VIES); it confirms a domain's TLD is real, not that the domain is registered.

Architecture

A TypeScript monorepo. Each domain is a typed library in packages/*; the qiniso umbrella aggregates them and exposes one MCP server over three transports — stdio (local / npx), Streamable HTTP (self-host), and a Cloudflare Worker (the hosted edge endpoint). The same core powers the importable library.

Terminal

npm install
npm run build
npm test

License

Apache-2.0

Read the full README →View source on GitHub →

Related MCP Servers

View all in Security View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

Last commit

2mo ago

Most recent push to the default branch.

Directory activity

1 views

Config copies, upvotes, and views on AllMCPs.

Reviews

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Frequently Asked Questions about Qiniso

No, Qiniso is stateless and requires no secrets or API keys.

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Technical Specs & Signals

CategorySecurity

10/11 checks healthy over the last 32d

47Quality signal: Fair · 47/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools22/30

Adoption & activity3/15

Community engagement0/10

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Overview

Use cases

Validate financial identifiers like IBAN, ISIN, and payment cards

Verify national and tax IDs across multiple countries

Check crypto wallet addresses for correctness

Parse and validate phone numbers and dates globally

Confirm domain TLDs and email formats against authoritative data

Key features

56 deterministic validation tools across 8 domains

Checksum and curated data-based verification

Stateless MCP server with no secret or user data required

TypeScript library available for local integration

Supports validation of identifiers, finance, crypto, locale, and addresses

Documentation Overview

Qiniso

The deterministic fact-verification layer for AI agents.

Verified, trustworthy data tools for AI agents. "Qiniso" means "truth" in Zulu.

Website · npm · MCP endpoint · MCP Registry

On arbitrary identifiers, a frontier LLM validates them wrong ~91% of the time, cold and silently. Qiniso: 0%.

Add it to Claude

Settings → Connectors → Add custom connector, and paste — no login, no key:

Code

https://qiniso.qinisolabs.workers.dev/mcp

Stateless, reads no user data, requires no secrets.

Use it as a library

Every check is also a typed function — no MCP required:

Terminal

npm i @qinisolabs/qiniso

server.ts

import { validateIban, validateVat } from "@qinisolabs/qiniso";

validateIban("GB82 WEST 1234 5698 7654 32");
// { valid: true, country: "United Kingdom", ... }

What it verifies — 56 tools across 8 domains

Domain	Tools
Identifiers	IBAN, payment card (Luhn + brand), ISBN-13, VIN, GTIN/UPC/EAN barcodes (+ GS1 country)
Web / network	TLD & domain (IANA root zone), IP, UUID, URL, email
Finance	ISIN, CUSIP, SEDOL, LEI, US ABA routing
Crypto	Ethereum (EIP-55), Bitcoin (Base58Check / Bech32) addresses
National & tax IDs	Brazil CPF/CNPJ, South Africa ID, Spain DNI/NIE, India Aadhaar, Italy, Poland, Netherlands, Belgium, Nordics, Portugal, Turkey, China, Germany Steuer-IdNr, France NIR, Switzerland AHV, Mexico CURP, Croatia OIB, Romania CNP, Bulgaria EGN, Estonia, Czech/Slovak rodné číslo, EU/UK VAT
Academic	ISBN-10, ISSN, ORCID
Locale	Phone (global), date parsing, currency, holidays (~200 countries), UK VAT-by-date
Addresses	UK/US address parsing

What it is not

Not a live-data provider. It verifies facts you give it; it does not return the current time, weather, or live exchange rates.
Not a credential sink. It never asks for secrets or API keys. (For JWT signature verification, use a library in your own runtime so the secret never leaves your machine.)
Not a registration check. It validates a VAT number's checksum, not whether it is live-registered (VIES); it confirms a domain's TLD is real, not that the domain is registered.

Architecture

Terminal

npm install
npm run build
npm test

License

Apache-2.0