Sparkasse Mittelthüringen API Access & Open Banking

Reaching your Sparkasse Mittelthüringen account data no longer means wrestling with eIDAS certificates or a bank sandbox. open-banking.io gives you a single, zero-knowledge path to your Thuringian bank: it covers 2,600+ EU and UK institutions, decrypts everything locally with a key only you hold, and costs around EUR 3/month. Whether you keep a personal current account or run business banking with Sparkasse Mittelthüringen (BIC HELADEF1WEM), the flow is the same and the bank never hands its data to anyone but you.

How to connect Sparkasse Mittelthüringen

Connecting happens entirely inside the open-banking.io dashboard — there is no API call, code, or key involved in this step.

1. Sign up for open-banking.io and set an encryption passphrase. Your key pair is generated on your own device, so only your public key ever leaves it.
2. In the dashboard, search for Sparkasse Mittelthüringen and choose your account type — business or personal.
3. You are redirected to Sparkasse Mittelthüringen's own secure login, where you approve access under PSD2. Consent lasts up to 180 days before you renew it.
4. Once approved, your accounts and transactions sync straight into your dashboard.

That's the whole connection. You authenticate only with the bank, never with a third party pretending to be it.

Access your data

Reading the data programmatically is an optional developer step you take after the account is linked. Open the Developers page, create an API key, and export a credentials.json — it bundles the API key together with your private decryption key. From there use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API directly. Every request carries the X-Api-Key header, and every response is decrypted locally on your machine. The API key alone only ever returns ciphertext; without your private key, no one — open-banking.io included — can read a single transaction.

FAQ

Can I link a business and a personal account?

Yes. Sparkasse Mittelthüringen supports both under PSD2. Connect each one separately in the dashboard and pick the matching account type during setup.

How long does access stay active?

Consent runs for up to 180 days. When it expires, you simply re-approve on Sparkasse Mittelthüringen's login screen to keep syncing.

Does open-banking.io ever see my banking data?

No. It is zero-knowledge and certificate-free — the service stores only your public key, so decryption happens on your device with a key only you control.

Start at https://open-banking.io.