Sparkasse Witten API Access & Open Banking Sync

Pulling your Sparkasse Witten balances and transactions into your own tools usually means wrestling with PSD2 certificates and sandbox paperwork. open-banking.io removes that layer entirely. It links to Sparkasse Witten (BIC WELADED1WTN) through the regulated PSD2 consent channel, then syncs your accounts into a dashboard where the data is decrypted locally with a key only you hold. Both business and personal account types are supported, and a single consent stays valid for up to 180 days before you renew it.

No certificates, no bank-specific onboarding, and no servers that can read your statements — open-banking.io is zero-knowledge and holds only your public key.

How to connect Sparkasse Witten

Connecting happens in the open-banking.io dashboard, not through any API call or code:

  1. Sign up for open-banking.io and set an encryption passphrase. Your keys are generated on your own device, so nobody else — not even open-banking.io — can derive them.
  2. In the dashboard, search for Sparkasse Witten and choose whether you're linking a business or personal account.
  3. You're redirected to Sparkasse Witten's own secure login, where you approve access on the bank's official PSD2 consent screen.
  4. Once approved, your accounts sync back into the dashboard and refresh automatically for the life of the consent.

That's the whole flow — you authorize directly with the bank, and open-banking.io never sees your credentials.

Access your data

Already connected and want programmatic access? This step is optional and for developers. Open the Developers page, create an API key, and export a credentials.json — it 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 key. Without that private key an API response is just ciphertext, which is exactly why the service stays zero-knowledge. The CLI and SDK only read and sync connections you've already made in the dashboard — there is no connect command.

All of this runs on the flat ~EUR 3/month plan covering 2,600+ EU and UK banks.

Do I need a PSD2 certificate for Sparkasse Witten?

No. open-banking.io is certificate-free; you approve access on Sparkasse Witten's consent screen instead.

Can open-banking.io read my Sparkasse Witten data?

No. Data is decrypted on your device with a key only you hold. The servers store only your public key.

How long does access last?

Up to 180 days per consent, after which you re-approve on the bank's login.

Start at open-banking.io.