Sparkasse Arnstadt-Ilmenau Open Banking & API Access

Need programmatic, read-only access to your Sparkasse Arnstadt-Ilmenau accounts? open-banking.io links your Thuringian Sparkasse (BIC HELADEF1ILK) to a single dashboard covering 2,600+ EU and UK banks. It is zero-knowledge and certificate-free: your encryption keys are generated on your own device, so account data is decrypted locally and nobody else — not even open-banking.io — can read it. Both business and personal accounts are supported, and a single PSD2 consent stays valid for up to 180 days before you re-approve.

How to connect Sparkasse Arnstadt-Ilmenau

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 created on your device; the servers only ever hold your public key.
  2. In the dashboard, pick Sparkasse Arnstadt-Ilmenau and choose the account type — business or personal.
  3. You are redirected to Sparkasse Arnstadt-Ilmenau's own secure login, where you approve access on the bank's consent screen (standard PSD2).
  4. Your accounts and transactions then sync back into your dashboard, ready to view.

Because you approve directly on the bank's site, your credentials are never seen by open-banking.io.

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. Every request carries the X-Api-Key header, and each response is decrypted locally with your own key. The CLI and SDK only read and sync connections you already approved in the dashboard — they cannot create one. An API key on its own returns ciphertext; without your private key it stays unreadable.

All of this runs for roughly EUR 3/month.

Is my Sparkasse Arnstadt-Ilmenau data private?

Yes. open-banking.io is zero-knowledge: decryption keys never leave your device, so only you can read the plaintext.

Up to 180 days per approval. After that you simply re-confirm access on Sparkasse Arnstadt-Ilmenau's consent screen.

Do I need certificates or a developer account to connect?

No. Connecting is certificate-free and done in the dashboard. API keys are only needed later if you want programmatic access.

Start at open-banking.io.