Sparkasse Donnersberg API Access & Open Banking

Reaching your Sparkasse Donnersberg accounts programmatically no longer means wrestling with PSD2 certificates or a bank sandbox. open-banking.io gives you a single, certificate-free path to your balances and transactions across 2,600+ European banks — and every byte is decrypted locally with a key that never leaves your device. Sparkasse Donnersberg (BIC MALADE51ROK) is fully supported for both business and personal accounts, with consent lasting up to 180 days before you renew.

Because open-banking.io is zero-knowledge, its servers only ever hold your public key. Your data stays ciphertext everywhere except on your own machine, so you get open banking without handing a third party the ability to read your finances.

How to connect Sparkasse Donnersberg

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 open the web dashboard.
  2. Set your encryption passphrase. Your key pair is generated right there on your device; the passphrase protects the private key only you hold.
  3. Pick Sparkasse Donnersberg in the dashboard and choose whether you're linking a business or personal account.
  4. Approve on Sparkasse Donnersberg's own consent screen. You're redirected to the bank's secure login to authorise access under PSD2 — your credentials go only to the bank.
  5. Your accounts sync back into the dashboard, ready to view.

Access your data

Once a connection exists, developers can optionally read it in code. On the Developers page, create an API key and export a credentials.json — this bundles your 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 authenticate with the X-Api-Key header, and every response is decrypted locally with your own key. An API key on its own returns only ciphertext — without your private key there's nothing readable. Note the CLI and SDK read and sync existing connections; they never create one.

All of this runs from roughly EUR 3/month, with no eIDAS certificate to buy or maintain.

Do I need a PSD2 certificate for Sparkasse Donnersberg?

No. open-banking.io is certificate-free — you authorise access directly on the bank's consent screen instead.

Can open-banking.io read my Sparkasse Donnersberg data?

No. The service is zero-knowledge and stores only your public key. Decryption happens on your device with the private key you control.

Up to 180 days, after which you re-approve access on the bank's login to keep syncing.

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