BankLink Python SDK

Official Python SDK for the BankLink Open Finance API. Link South African bank accounts, ingest transactions, and deliver them anywhere.

Install

pip install banklink

Quick Start

from banklink import BankLink

client = BankLink(api_key="bl_live_...")

# List all linked accounts
accounts = client.accounts.list()
for account in accounts.data:
    print(account.id, account.bank, account.account_number)

# Fetch a single page of transactions
page = client.transactions.list("acc_123", limit=50)
for txn in page.data:
    print(txn.date, txn.description, txn.amount, txn.direction)

# Auto-paginate through all transactions
for txn in client.transactions.list_auto_paginate("acc_123"):
    print(txn.date, txn.amount)

# Get account balance
balance = client.balances.get("acc_123")
print(balance.balance, balance.currency)

# Trigger an on-demand sync
result = client.accounts.sync("acc_123")
print(f"Synced {result.synced} transactions, skipped {result.skipped}")

Async Support

import asyncio
from banklink import AsyncBankLink

async def main():
    async with AsyncBankLink(api_key="bl_live_...") as client:
        accounts = await client.accounts.list()
        for account in accounts.data:
            print(account.id, account.bank)

        # Async auto-pagination
        async for txn in client.transactions.list_auto_paginate("acc_123"):
            print(txn.date, txn.amount)

asyncio.run(main())

Bank Linking

from banklink import BankLink

client = BankLink(api_key="bl_live_...")

# Initiate a link flow
result = client.link.create(
    bank_id="fnb",
    credentials={"username": "your_username", "password": "your_password"},
    nickname="My FNB Account",
)

if result.type == "otp_required":
    # Submit OTP if required
    result = client.link.submit_otp(
        session_token=result.session_token,
        otp="123456",
    )

print("Linked:", result.profile_id, result.account_number)

Error Handling

from banklink import BankLink, AuthenticationError, NotFoundError, RateLimitError, BankLinkError

client = BankLink(api_key="bl_live_...")

try:
    account = client.accounts.get("acc_does_not_exist")
except AuthenticationError:
    print("Invalid or missing API key")
except NotFoundError:
    print("Account not found")
except RateLimitError:
    print("Rate limit exceeded — back off and retry")
except BankLinkError as e:
    print(f"API error {e.status}: [{e.code}] {e.message}")

Configuration

from banklink import BankLink

client = BankLink(
    api_key="bl_live_...",
    base_url="https://api.banklink.co.za/v1",  # default
    timeout=30.0,                               # seconds, default 30
)

Use the context manager to ensure connections are closed:

with BankLink(api_key="bl_live_...") as client:
    accounts = client.accounts.list()

Requirements

• Python 3.9+
• httpx >= 0.24 (installed automatically)

License

MIT — Copyright (c) 2026 Aurvex Labs