Stadtsparkasse Offenbach API Access & Open Banking

Stadtsparkasse Offenbach (BIC HELADEF1OFF) serves customers across the Offenbach region with everyday banking, and open-banking.io lets you reach that account data on your own terms. Whether you hold a personal or a business account, you can bring balances and transaction history into one dashboard and, if you write software, read the same data programmatically — without certificates, eIDAS setup, or a bank sandbox agreement.

What makes open-banking.io different is the trust model. Your bank data is decrypted locally with an encryption key only you hold. The service is zero-knowledge: its servers store only your public key, so no one at open-banking.io — or anyone who breaches it — can read your Stadtsparkasse Offenbach statements.

How to connect Stadtsparkasse Offenbach

Connecting happens entirely in 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 your encryption passphrase. Your keys are generated on your own device.
  2. In the dashboard, pick Stadtsparkasse Offenbach and choose the account type you need — business or personal.
  3. You are redirected to Stadtsparkasse Offenbach's own secure login, where you approve access under PSD2. Your credentials are only ever entered on the bank's screen.
  4. Once approved, your accounts sync into the dashboard. The consent you grant lasts up to 180 days, after which you simply reauthorise.

Access your data

Reading the data programmatically is an optional developer step you take after connecting. From 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. Requests carry the X-Api-Key header, and every response is decrypted locally with your own key. Without that private key an API key alone returns only ciphertext — which is exactly the point.

All of this runs at around EUR 3/month.

Do I need a developer certificate for Stadtsparkasse Offenbach?

No. open-banking.io is certificate-free. You approve access on the bank's consent screen and skip the usual eIDAS/QWAC paperwork.

Can open-banking.io read my Stadtsparkasse Offenbach data?

No. It holds only your public key. Data is decrypted on your device with a private key that never leaves you.

How long does access last?

Stadtsparkasse Offenbach permits consent for up to 180 days. When it expires, reauthorise from the dashboard in a few clicks.

Ready to start? Visit open-banking.io.