Sparkasse Mitten im Sauerland API & Open Banking Access
Pulling balances and transactions out of Sparkasse Mitten im Sauerland (BIC WELADED1MES) usually means wrestling with certificates and PSD2 paperwork. open-banking.io removes all of that. It gives you regulated access to your business and personal accounts through a single dashboard, and because it is zero-knowledge, your statements are decrypted only on your own device with a key that never leaves it. No eIDAS certificate, no bank-specific integration work — just a login and a passphrase.
How to connect Sparkasse Mitten im Sauerland
Connecting happens entirely inside the open-banking.io dashboard — there is no API call, code, or key involved in linking your account.
- Sign up for open-banking.io and set your encryption passphrase. Your keys are generated locally on your device, so open-banking.io only ever holds your public key.
- In the dashboard, pick Sparkasse Mitten im Sauerland and choose your account type — business or personal.
- You are redirected to Sparkasse Mitten im Sauerland's own secure login, where you approve access (the standard PSD2 consent). Your credentials are entered only on the bank's site.
- Your accounts sync back into the dashboard. Consent lasts up to 180 days, after which you simply re-approve on the bank's screen.
Access your data
Once the connection is live, reading it programmatically is an optional developer step. From the Developers page, create an API key and export a credentials.json — this bundles the API key together with your private decryption key. Then use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API. Requests authenticate with the X-Api-Key header, and every response is decrypted locally with your own key. The CLI and SDK only read and sync connections you already made in the dashboard — there is no connect command, and an API key on its own returns only ciphertext until your private key unlocks it.
At around EUR 3/month across 2,600+ EU/UK banks, it is a low-cost way to turn Sparkasse Mitten im Sauerland data into something you can build on.
Is my banking login shared with open-banking.io?
No. You authenticate on Sparkasse Mitten im Sauerland's own login page. open-banking.io never sees your credentials.
Can open-banking.io read my transactions?
No. The service is zero-knowledge — it stores only your public key, so data is decrypted solely on your device.
How long does access last?
Sparkasse Mitten im Sauerland permits consent for up to 180 days; re-approve from the dashboard to continue syncing.
Start at open-banking.io.