GRENKE BANK Open Banking & API Access | open-banking.io

Pulling your GRENKE BANK account data into your own tools usually means certificates, sandbox registrations and eIDAS paperwork. open-banking.io removes all of that. It is a zero-knowledge, certificate-free bridge to 2,600+ banks across the EU and UK, and GRENKE BANK (BIC GREBDEH1XXX) is one of them. You approve access once, your balances and transactions sync into a private dashboard, and every byte is decrypted locally with a key that never leaves your device.

Both business and personal GRENKE BANK accounts are supported, and a single PSD2 consent stays valid for up to 180 days before you renew it.

How to connect GRENKE 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 keys are generated right there on your own device.
  2. In the dashboard, choose GRENKE BANK and pick the account type you want to link (business or personal).
  3. You are redirected to GRENKE BANK's own secure login, where you approve the access request on the bank's PSD2 consent screen.
  4. Control returns to open-banking.io and your GRENKE BANK accounts begin syncing automatically.

That is the whole flow. You never hand credentials to open-banking.io — authentication stays on GRENKE BANK's side.

Access your data

Once GRENKE BANK is connected, reading it programmatically is an optional developer step. 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 carry your key in the X-Api-Key header, and every response is decrypted locally with your private key. The CLI and SDK only read and sync connections you have already made in the dashboard.

Because open-banking.io is zero-knowledge, its servers hold only your public key — they can never read or decrypt your GRENKE BANK data. An API key on its own returns ciphertext; without your private key it stays unreadable. All of this runs for around EUR 3/month.

FAQ

Do I need an eIDAS certificate for GRENKE BANK?

No. open-banking.io is certificate-free. You approve access on GRENKE BANK's consent screen and skip the usual PSD2 certificate setup entirely.

Yes. GRENKE BANK supports both account types, and you can connect each from the dashboard under one open-banking.io subscription.

GRENKE BANK consent lasts up to 180 days. When it expires, re-approve on the bank's login to keep your data syncing.

Ready to start? Visit open-banking.io.