Sparkasse Duderstadt API Access & Open Banking

Reaching your Sparkasse Duderstadt account data no longer requires bank-specific certificates or a heavyweight PSD2 licence. open-banking.io gives you regulated access to this Eichsfeld savings bank (BIC NOLADE21DUD) through a single dashboard that covers 2,600+ EU and UK banks. Whether you run a business or hold a personal account, you approve one consent and your balances and transactions flow into a place only you can decrypt.

The service is zero-knowledge: your encryption keys are generated on your own device from a passphrase you choose. open-banking.io stores only your public key, so its servers never see readable account data — everything is unlocked locally, on your side.

How to connect Sparkasse Duderstadt

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 your encryption passphrase. Your private key is created on your device and never leaves it.
  2. In the dashboard, search for Sparkasse Duderstadt and choose your account type — business or personal.
  3. You are redirected to Sparkasse Duderstadt's own secure login and consent screen, where you approve access under PSD2.
  4. Once approved, your accounts sync back into your dashboard. Consent lasts up to 180 days, after which you simply renew it.

Access your data

After the connection exists, developers can optionally read it programmatically. From the Developers page, create an API key and export a credentials.json — this bundles the API key and 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. Without that private key, an API key alone returns only ciphertext — which is exactly what keeps the model zero-knowledge.

All of this runs for around EUR 3/month, with no certificate wrangling.

Do I need a developer account to connect?

No. Connecting Sparkasse Duderstadt is a point-and-click dashboard step. API keys are only for reading data afterwards.

Can open-banking.io see my Sparkasse Duderstadt balance?

No. Data is encrypted to your key and decrypted on your device. The servers hold only your public key.

How long does access last?

Up to 180 days per PSD2 consent, then you re-approve on Sparkasse Duderstadt's own login screen.

Get started at open-banking.io.