Volksbank Viersen API Access & Open Banking

Reaching Volksbank Viersen account data used to mean eIDAS certificates, sandbox registrations and PSD2 paperwork. open-banking.io removes all of that. It is a certificate-free, zero-knowledge service covering 2,600+ banks across the EU and UK, and it lets you view and export your Volksbank Viersen accounts without ever handing your data to a third party in readable form. Your encryption keys are generated on your own device, so only you can decrypt what syncs in.

Volksbank Viersen (BIC GENODED1VSN) is supported for both business and personal accounts, with a PSD2 consent that stays valid for up to 180 days before you re-approve.

How to connect Volksbank Viersen

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 key pair is created locally, so the servers only ever hold your public key.
  2. In the dashboard, pick Volksbank Viersen from the bank list and choose the account type you want — business or personal.
  3. You are redirected to Volksbank Viersen's own secure login, where you approve access on the bank's consent screen (standard PSD2 authorisation).
  4. Once approved, your accounts and transactions sync straight into your dashboard, ready to view.

That's the whole flow: no developer redirect, no eIDAS certificate, no code.

Access your data

Want to read the data programmatically? That's an optional step you take after connecting. 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. An API key on its own only ever returns ciphertext — open-banking.io cannot read it, and neither can anyone without your private key.

All of this runs for roughly EUR 3/month.

Do I need a PSD2 certificate for Volksbank Viersen?

No. open-banking.io is certificate-free — you authorise directly on Volksbank Viersen's consent screen and nothing else is required.

Can open-banking.io see my Volksbank Viersen transactions?

No. It's zero-knowledge. Data is encrypted with keys held only on your device, so the service stores ciphertext it cannot decrypt.

How long does access last before I reconnect?

Volksbank Viersen consent lasts up to 180 days. After that you simply re-approve on the bank's login screen.

Ready to start? Visit open-banking.io.