axiom-luhn-check

Other

Luhn algorithm validator — credit cards (Visa, MC, Amex, Discover), SIRET/SIREN, IMEI, ISBN-10/13. Use when you need to validate any number that uses Luhn. Pure stdlib, no LLM.

Install

openclaw skills install axiom-luhn-check

axiom-luhn-check

Version: 0.1.2 Axioma Tools

Validates numbers using the Luhn algorithm with auto-detection of common types.

What this skill does

Luhn check on any number string
Auto-detects type (Visa/MC/Amex/Discover/SIRET/IMEI/ISBN-10/13)
JSON output for scripting
Handles spaces and dashes in input

When to use this skill

✅ Validate credit card before submission
✅ Audit IMEI of mobile devices
✅ Validate ISBN before cataloging books
✅ Validate French SIRET/SIREN
❌ Need PCI-compliant full validation (this is checksum only)

Usage

python3 axiom_luhn_check.py "4532 0151 1283 0366"
python3 axiom_luhn_check.py "356938035643809" --json

from axiom_luhn_check import validate, detect_type
validate('4532015112830366')  # True
detect_type('356938035643809')  # 'amex'

Validation

Check	Status
Unit tests	25+ cases
Performance	<100ms
Security	Pure stdlib, no injection
Determinism	Byte-to-byte stable
License	Apache-2.0

Last updated: 2026-06-14