Westerwald Bank API Access & Open Banking

Reaching your Westerwald Bank accounts programmatically no longer means wrestling with PSD2 certificates or bank-specific sandboxes. open-banking.io gives you a single, standards-based path to your Westerwald Bank data across the EU and UK, covering 2,600+ institutions. Your information is decrypted locally with a key only you hold, so the service itself never sees your balances or transactions. Westerwald Bank (BIC GENODE51WW1) supports both business and personal accounts, with consent valid for up to 180 days before you renew.

How to connect Westerwald Bank

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 cryptographic keys are generated on your own device.
  2. In the dashboard, search for and select Westerwald Bank, then choose whether you are linking a business or personal account.
  3. You are redirected to Westerwald Bank's own secure login, where you approve access on the bank's PSD2 consent screen — your credentials stay with the bank.
  4. Once approved, your accounts sync into your open-banking.io dashboard automatically, and refresh for the duration of the 180-day consent.

Access your data

After your Westerwald Bank connection is live, 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 you can 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 alone only ever returns ciphertext, because open-banking.io stores just your public key and can never read your data.

The whole service is certificate-free and zero-knowledge, and costs around EUR 3/month.

Do I need a PSD2 certificate for Westerwald Bank?

No. open-banking.io handles the regulated connection, so you approve access directly on Westerwald Bank's consent screen without any certificate of your own.

Can I connect a Westerwald Bank account via the CLI?

No. The CLI and SDKs only read and sync connections that already exist. Linking Westerwald Bank is always done in the dashboard.

How long does access last?

Westerwald Bank consent lasts up to 180 days, after which you re-approve from the dashboard to keep your data flowing.

Start at open-banking.io.