🏦 BankKit

Python SDK for validating banking data — built for Latin America, ready for the world.

BankKit validates banking identifiers, account numbers, documents, and financial keys across Latin America and international standards — no API calls, no dependencies, just fast and reliable validation.

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Why BankKit?

Most validation libraries are built for Europe. BankKit was built with Latin America first — covering Brazil, Mexico, Argentina, and Chile — while also supporting global standards like IBAN, SWIFT, and card numbers.

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Installation

pip install bankkit

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Quick Start

from bankkit import BankKit

bk = BankKit()

# Validate a PIX key
bk.validate_pix("11122233344")
# → {"valid": True, "type": "CPF", "error": None}

# Validate an IBAN
bk.validate_iban("GB82WEST12345698765432")
# → {"valid": True, "country": "United Kingdom", "code": "GB", "error": None}

# Validate a passport
bk.validate_passport("AB123456", "BR")
# → {"valid": True, "country": "BR", "format": "2 letters + 6 digits", "error": None}

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Features

🇧🇷 Brazil

Function	What it validates	Standard
validate_cpf(cpf)	CPF check digit	Receita Federal
validate_cnpj(cnpj)	CNPJ check digit	Receita Federal
validate_pix(key)	PIX key by type (CPF, CNPJ, email, phone, UUID)	BACEN
validate_br_account(agency, account, code?)	Bank account + optional bank lookup	BACEN / COMPE

🇦🇷 Argentina

Function	What it validates	Standard
validate_cbu(cbu)	CBU/CVU (22 digits, dual block check)	BCRA

🇲🇽 Mexico

Function	What it validates	Standard
validate_clabe(clabe)	CLABE (18 digits, weighted check digit)	BANXICO

🇨🇱 Chile

Function	What it validates	Standard
validate_rut(rut)	RUT — accepts formats like "12.345.678-5" or "K"	SII

🇺🇸 United States

Function	What it validates	Standard
validate_routing(routing)	ABA Routing Number + Federal Reserve district	ABA

🇨🇦 Canada

Function	What it validates	Standard
validate_ca_routing(routing)	Routing number (transit + institution)	Payments Canada
validate_ca_account(account)	Account number format	Payments Canada

🌍 International

Function	What it validates	Standard
validate_iban(iban)	IBAN format + MOD 97 checksum (80+ countries)	ISO 13616
validate_swift(swift)	SWIFT/BIC format + country code	ISO 9362
validate_card(number)	Card number + brand detection (Luhn)	ISO 7812
validate_bin(bin)	BIN (first 6 digits) + brand detection	ISO 7812
validate_passport(number, country)	Passport format by country (30+ countries)	ICAO 9303

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Usage Examples

Brazil

# CPF
bk.validate_cpf("111.444.777-35")
# → {"valid": True, "error": None}

# CNPJ
bk.validate_cnpj("11.222.333/0001-81")
# → {"valid": True, "error": None}

# PIX — auto-detects key type
bk.validate_pix("user@email.com")
# → {"valid": True, "type": "EMAIL", "error": None}

bk.validate_pix("+5511999999999")
# → {"valid": True, "type": "PHONE", "error": None}

# Bank account with optional bank code
bk.validate_br_account("0001", "123456", code="341")
# → {"valid": True, "bank": "Itaú Unibanco", "error": None}

Latin America

# Argentina — CBU
bk.validate_cbu("0720599600000057836902")
# → {"valid": True, "bank": None, "error": None}

# Mexico — CLABE
bk.validate_clabe("032180000118359719")
# → {"valid": True, "bank_code": "032", "bank": "IXE Banco", "error": None}

# Chile — RUT
bk.validate_rut("76.354.771-K")
# → {"valid": True, "error": None}

North America

# USA — ABA Routing Number
bk.validate_routing("021000021")
# → {"valid": True, "district": "New York", "error": None}

# Canada — Routing Number
bk.validate_ca_routing("000011001")
# → {"valid": True, "institution": "001", "bank": "Bank of Montreal (BMO)", "error": None}

# Canada — Account
bk.validate_ca_account("12345678")
# → {"valid": True, "error": None}

International

# IBAN
bk.validate_iban("GB82WEST12345698765432")
# → {"valid": True, "country": "United Kingdom", "code": "GB", "error": None}

# SWIFT/BIC
bk.validate_swift("BRASBRRJXXX")
# → {"valid": True, "bank_code": "BRAS", "country": "BR", "error": None}

# Card number
bk.validate_card("4111111111111111")
# → {"valid": True, "brand": "Visa", "error": None}

# BIN
bk.validate_bin("636368")
# → {"valid": True, "brand": "Elo", "error": None}

# Passport
bk.validate_passport("AB123456", "BR")
# → {"valid": True, "country": "BR", "format": "2 letters + 6 digits", "error": None}

bk.validate_passport("A12345678", "US")
# → {"valid": True, "country": "US", "format": "1 letter + 8 digits", "error": None}

Accessing specific fields

result = bk.validate_iban("GB82WEST12345698765432")
result["country"]  # → "United Kingdom"
result["code"]     # → "GB"
result["valid"]    # → True

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Response Format

Every function returns a consistent dict:

{
  "valid": bool,        # always present
  "error": str | None,  # present when valid is False
  # + additional fields depending on the validator
}

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Standards & References

BankKit follows official specifications:

• IBAN → ISO 13616
• SWIFT/BIC → ISO 9362
• Card Numbers → ISO 7812 + Luhn Algorithm
• Passport → ICAO Doc 9303
• PIX / COMPE / ISPB → BACEN
• CLABE → BANXICO
• CBU/CVU → BCRA
• RUT → SII Chile
• ABA Routing → ABA
• CA Routing → Payments Canada

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Contributing

Contributions are welcome — especially for expanding country coverage and bank data.

1. Fork the repository
2. Create your branch (git checkout -b feat/add-colombia)
3. Add your validator in the correct folder (validators/latam/validator_co.py)
4. Add tests (tests/latam/test_co.py)
5. Open a Pull Request

Looking for ideas? Check issues labeled good first issue.

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License

MIT © Otavio Vicario Muraca