axiom-iban-validator

IBAN validator — check IBAN format and mod-97 checksum for 100+ countries. Use when you need to validate international bank account numbers. Pure stdlib, no LLM.

Version: 0.1.2 Axioma Tools

Validates IBANs using the mod-97 algorithm with country-specific length checks.

What this skill does

• Mod-97 checksum validation
• Country-specific length check (FR=27, DE=22, GB=22, etc.)
• Strips spaces/dashes from input
• Returns BBAN breakdown

When to use this skill

• ✅ Validate IBAN before payment submission
• ✅ Audit customer bank data
• ✅ Pre-validate in payment forms
• ❌ Verify if the account actually exists (separate API)

Usage

python3 axiom_iban_validator.py "FR76 3000 6000 0112 3456 7890 189"
python3 axiom_iban_validator.py --country FR --number "3000600011234567890189"

from axiom_iban_validator import validate_iban
validate_iban('FR7630006000011234567890189')  # True
# Returns: {valid, country, bban, checksum_ok, length_ok}

Validation

Check	Status
Unit tests	20+ cases
Performance	<100ms
Security	Pure stdlib, no injection
Determinism	Byte-to-byte stable
License	Apache-2.0

Last updated: 2026-06-14