Sparkasse Gladbeck API Access & Open Banking Data

Sparkasse Gladbeck (BIC WELADED1GLA) serves the town of Gladbeck in North Rhine-Westphalia, and open-banking.io lets you reach its account data through a single privacy-first dashboard. Whether you hold a personal current account or a business account, you can pull balances and transactions into one place — and, if you write software, read the same data programmatically without ever handing your credentials or decryption key to a third party.

open-banking.io is a zero-knowledge, certificate-free service covering 2,600+ EU and UK banks. Your data is decrypted locally with a key that only you hold; the platform stores just your public key, so it can never read your Sparkasse Gladbeck balances on its servers.

How to connect Sparkasse Gladbeck

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 an open-banking.io account.
  2. Set an encryption passphrase. Your encryption keys are generated right there on your own device.
  3. In the dashboard, pick Sparkasse Gladbeck and choose your account type — business or personal.
  4. You're redirected to Sparkasse Gladbeck's own secure login, where you approve access under PSD2. This consent lasts up to 180 days before you renew it.
  5. Your accounts sync back into the dashboard, ready to view.

Access your data

Once the connection exists, developers can optionally read it programmatically. On the Developers page, create an API key and export a credentials.json — this 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 authenticate with the X-Api-Key header, and every response is decrypted locally with your own key. The CLI and SDK only read and sync connections you already made in the dashboard — there is no connect command. An API key alone returns ciphertext; without your private key it stays unreadable.

All of this runs for around EUR 3 per month, with no eIDAS certificates to obtain.

Does open-banking.io see my Sparkasse Gladbeck data?

No. It is zero-knowledge — it holds only your public key, and decryption happens on your device.

Which account types are supported?

Both business and personal Sparkasse Gladbeck accounts can be connected.

How long does access last before I re-approve?

PSD2 consent runs up to 180 days, after which you renew it on the bank's consent screen.

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