Sparkasse Wiesental API Access & Open Banking Data

Sparkasse Wiesental (BIC SOLADES1SFH) serves customers along the Wiese valley in Baden-Württemberg, and open-banking.io gives you a straightforward way to reach its account data under PSD2. Both business and personal accounts are supported, and a single approval keeps your connection live for up to 180 days before you refresh it. There are no eIDAS certificates to obtain and no bank-specific paperwork — everything runs through one dashboard, and every figure you see is decrypted on your own device.

How to connect Sparkasse Wiesental

Connecting happens entirely inside the open-banking.io dashboard — there is no API call, code, or key involved in this step.

  1. Sign up at open-banking.io and set your encryption passphrase. Your keys are generated locally on your device, so only you ever hold the private half.
  2. In the dashboard, search for Sparkasse Wiesental and choose whether you're linking a business or personal account.
  3. You're redirected to Sparkasse Wiesental's own secure login, where you approve access on the bank's consent screen (valid for up to 180 days).
  4. Your accounts and transactions then sync back into your dashboard, ready to view.

Because open-banking.io is zero-knowledge, its servers only ever hold your public key — they can store the ciphertext but never read your balances or transactions.

Access your data

Once Sparkasse Wiesental is connected, developers can optionally read the data programmatically. Open 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 directly. Requests authenticate with the X-Api-Key header, and each response is decrypted locally with your key. The CLI and SDK only read and sync connections you already made in the dashboard — they never create new ones.

All of this is included for around EUR 3/month across 2,600+ supported banks.

Do I need an eIDAS certificate for Sparkasse Wiesental?

No. open-banking.io is certificate-free — you only need an account and your passphrase to connect.

Can open-banking.io staff see my Sparkasse Wiesental data?

No. The service holds only your public key. Data is encrypted at rest and decrypted locally, so no one else can read it.

Is an API key enough to read my transactions?

No. An API key alone returns only ciphertext. Readable data requires your private decryption key from credentials.json.

Start at open-banking.io.