OstseeSparkasse Rostock API Access & Open Banking

Reaching your OstseeSparkasse Rostock accounts programmatically usually means chasing PSD2 certificates and eIDAS paperwork. open-banking.io removes that entirely. It links your OstseeSparkasse Rostock accounts through a regulated, certificate-free channel, then hands you the data in a form only you can read. Both business and personal accounts at the Rostock savings bank (BIC NOLADE21ROS) are supported, and a single access consent lasts up to 180 days before OstseeSparkasse Rostock asks you to renew it.

The design 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 physically cannot read or decrypt your OstseeSparkasse Rostock transactions. Everything is unlocked locally, on your machine.

How to connect OstseeSparkasse Rostock

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 private key is created right there on your device.
  2. In the dashboard, search for OstseeSparkasse Rostock and choose the account type you need — business or personal.
  3. You are redirected to OstseeSparkasse Rostock's own secure login, where you approve access on the bank's consent screen (standard PSD2 authorisation).
  4. Once approved, your accounts and transactions sync back into your open-banking.io dashboard, encrypted to your key.

That's the whole flow. No developer setup, no redirect you have to build yourself.

Access your data

Want the data in code? That's an optional step you take after connecting. Open 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 directly. Every request carries the X-Api-Key header, and each response is decrypted locally with your own key. An API key on its own only ever returns ciphertext — without your private key, no one, including open-banking.io, can read it.

All of this runs for about EUR 3 per month, across 2,600+ EU and UK banks.

Does OstseeSparkasse Rostock need a developer agreement?

No. You authorise access on OstseeSparkasse Rostock's own login screen. There are no certificates or bank contracts to arrange.

How long does access stay valid?

Up to 180 days per consent. After that, you simply re-approve through the dashboard to keep syncing.

Can open-banking.io see my balances?

No. It holds only your public key. Your OstseeSparkasse Rostock data is decrypted solely on your device.

Get started at open-banking.io.