Bethmann Bank API Access & Open Banking Guide

Bethmann Bank (BIC DELBDE33XXX), one of Germany's established private-banking names, keeps its accounts behind PSD2. open-banking.io lets you reach both business and personal Bethmann Bank accounts without eIDAS certificates or a bank-side integration — just a dashboard and a passphrase only you hold.

How to connect Bethmann Bank

Connecting happens entirely in the open-banking.io dashboard — there is no API call, code, or key involved. Sign up, then set an encryption passphrase; your keys are generated locally on your own device. In the dashboard, pick Bethmann Bank and choose your account type (business or personal). You are redirected to Bethmann Bank's own secure login, where you approve access under PSD2. Consent lasts up to 180 days, after which you simply re-approve. Your accounts then sync back into your dashboard automatically.

Access your data

Reading data programmatically is an optional developer step you take after connecting. From the Developers page, create an API key and export a credentials.json — this bundles the API key together with your private decryption key. Then 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. The CLI and SDK only read and sync connections that already exist — there is no connect command.

Because open-banking.io is zero-knowledge, its servers hold only your public key and never see readable data — an API key on its own returns ciphertext without your private key. All of this runs for around EUR 3 per month across 2,600+ EU and UK banks, certificate-free.

Do I need an eIDAS certificate for Bethmann Bank?

No. open-banking.io is certificate-free; you approve access directly on Bethmann Bank's own login screen.

Can open-banking.io read my Bethmann Bank balances?

No. Data is decrypted on your device with a key only you hold; the service stores only your public key.

How long does Bethmann Bank access stay active?

Up to 180 days per PSD2 consent, then you re-approve from the dashboard.

Ready to start? Head to open-banking.io.