Cronbank API Access & Open Banking Integration

Cronbank AG is a German cooperative bank (BIC GENODE51CRO), and open-banking.io lets you reach both its business and personal accounts through a single, privacy-first workspace. Instead of chasing eIDAS certificates or building a PSD2 stack yourself, you link Cronbank once in the dashboard and read balances and transactions on your own terms — with data that only you can decrypt.

How to connect Cronbank

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 an encryption passphrase. Your key pair is generated locally on your device, so open-banking.io only ever holds your public key.
  2. In the dashboard, choose Cronbank and select the account type you need — business or personal.
  3. You are redirected to Cronbank's own secure login, where you approve access under PSD2. open-banking.io never sees your banking credentials.
  4. Your accounts sync back into the dashboard. The consent you grant lasts up to 180 days, after which you simply re-approve on Cronbank's screen.

Access your data

Reading Cronbank data programmatically is an optional developer step you take after the connection exists. Open the Developers page, create an API key, and export a credentials.json bundling that key with your private decryption key. From there use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API. Every request carries the X-Api-Key header, and each response is decrypted locally with your own key — the servers store only ciphertext. An API key on its own returns unreadable data without your private key, which is the heart of the zero-knowledge design.

All of this runs at roughly EUR 3/month, with no certificate paperwork and access to 2,600+ EU and UK banks from one account.

Does open-banking.io store my Cronbank login?

No. You authenticate directly on Cronbank's site, and open-banking.io holds only your public key — never your credentials or a readable copy of your data.

Can the CLI connect Cronbank for me?

No. The CLI and SDK only read or sync connections that already exist. Linking Cronbank always happens in the dashboard via Cronbank's consent screen.

How long does access last?

Each Cronbank consent is valid for up to 180 days for both business and personal accounts; renew it with a quick re-approval when it lapses.

Start linking Cronbank at open-banking.io.