Sparkasse Neu-Ulm-Illertissen API Access & Open Banking

Reach your Sparkasse Neu-Ulm-Illertissen accounts through open-banking.io, a certificate-free EU/UK open-banking service covering 2,600+ banks. Both business and personal accounts (BIC BYLADEM1NUL) are supported, and every balance and transaction is decrypted locally with a key that only you hold — open-banking.io stores just your public key and never sees your data in the clear.

How to connect Sparkasse Neu-Ulm-Illertissen

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 keys are generated on your own device, so nobody else can reconstruct them.
  2. In the dashboard, pick Sparkasse Neu-Ulm-Illertissen and choose the account type you need — business or personal.
  3. You are redirected to Sparkasse Neu-Ulm-Illertissen's own secure login, where you approve access under PSD2. Consent lasts up to 180 days before you renew it.
  4. Your approved accounts sync straight into your dashboard, ready to view.

Because the login and approval happen on the bank's own consent screen, open-banking.io never touches your Sparkasse Neu-Ulm-Illertissen credentials.

Access your data

Once a 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 each response is decrypted locally with your own key. The tools only read and sync connections you already approved — there is no connect command, and an API key on its own returns nothing but ciphertext without your private key.

At roughly EUR 3/month, this is a low-cost, privacy-first alternative to eIDAS-certificate setups: no certificates, no per-call fees, and genuine zero-knowledge encryption.

Does open-banking.io see my Sparkasse Neu-Ulm-Illertissen data?

No. Data is encrypted to your key and decrypted on your device. The servers hold only your public key, so they can never read your balances or transactions.

Which account types can I connect?

Both business and personal Sparkasse Neu-Ulm-Illertissen accounts are supported (BIC BYLADEM1NUL).

PSD2 consent for Sparkasse Neu-Ulm-Illertissen lasts up to 180 days. After that you re-approve on the bank's consent screen to keep syncing.

Start at open-banking.io.