What does Veridigit validate?
It validates the structure (format + checksum) of IBANs, credit card numbers, ISBN‑13, and VINs. It does not confirm whether an account, card, book, or vehicle actually exists or is active.
Veridigit MCP Server
@qinisolabs
基本信息
关于 Veridigit MCP Server
Verified IBAN, payment card, ISBN-13 and VIN validation for AI agents — runs the real checksum algorithms (mod-97, Luhn, mod-10, ISO 3779) instead of letting the model guess, and returns structured results with clear errors.
Veridigit MCP Server 配置
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"veridigit": {
"command": "npx",
"args": [
"-y",
"veridigit"
]
}
}
}Veridigit MCP Server 工具
4ISO 7064 mod-97 checksum + country-specific length (75+ countries)
Luhn checksum, brand detection from the BIN, length rules
ISBN-13: 978/979 prefix + mod-10 weighted check digit
ISO 3779 alphabet (no I/O/Q) + position-9 transliteration check digit
概览
What is Veridigit?
Veridigit is a tool that validates structured identifiers (IBAN, credit card, ISBN, VIN) using real checksum algorithms, returning parsed parts and clear reasons when something is wrong. It is designed for AI agents that otherwise invent or mistype check digits.
How to use Veridigit?
Install as an MCP server by adding veridigit to your mcpServers config: {"command": "npx", "args": ["-y", "veridigit"]}. Alternatively, import it as a typed TypeScript library via npm install veridigit. No API key is required.
Key features of Veridigit
validate_iban: ISO 7064 mod-97 checksum + country-specific length (75+ countries)validate_card: Luhn checksum, brand detection from BIN, length rulesvalidate_isbn: ISBN‑13 978/979 prefix + mod‑10 weighted check digitvalidate_vin: ISO 3779 alphabet (no I/O/Q) + position‑9 transliteration check digit- Validates structure only; no network calls made
Use cases of Veridigit
- Preventing an AI agent from accepting malformed IBANs
- Correcting credit card check digits that LLMs invent
- Validating ISBN‑13 numbers generated by a language model
- Checking VIN check digits against the ISO 3779 standard
常见问题
How does Veridigit compare to a language model guessing check digits?
In a benchmark of 32 randomly generated identifiers, a frontier model without Veridigit got the check digit wrong 91% of the time, while Veridigit had 0% error.
Does Veridigit require an API key or make network calls?
No. Veridigit is free, requires no API key, and makes no network calls. It runs entirely locally.
What dependencies or runtime are needed?
It runs as an MCP server via `npx` (Node.js) or can be imported as a TypeScript library. No other runtime dependencies are mentioned.
Are there any known limitations?
Veridigit validates only the structural correctness of an identifier. It does not confirm ownership, activity, or real-world existence of the referenced item.
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