Postbank API Access & Open Banking Integration

Reach your Postbank accounts through a single, privacy-first layer. open-banking.io lets you link Postbank (BIC PBNKDEFF) and pull balances and transactions into one dashboard — with the option to read everything programmatically later. It works across 2,600+ EU and UK banks, needs no eIDAS certificate, and is built so that only you can decrypt your own data.

Postbank supports both business and personal accounts, and a single PSD2 consent stays valid for up to 180 days before you renew it.

How to connect Postbank

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 locally on your own device, so nobody else can reproduce them.
  2. In the dashboard, choose Postbank and select whether you're linking a business or personal account.
  3. You're redirected to Postbank's own secure login, where you approve access under PSD2 — your credentials go straight to the bank, never to us.
  4. Once approved, your Postbank accounts sync into your dashboard and refresh automatically.

That's the whole flow: pick the bank, approve on Postbank's screen, done.

Access your data

Reading Postbank data in code is an optional step you take after the connection exists. Open the Developers page, create an API key, and export a credentials.json file. That file bundles your API key together with your private decryption key.

With it in place you can use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API directly. Every request authenticates with the X-Api-Key header, and each response is decrypted locally using your own key — the API key alone only ever returns ciphertext.

There is no connect command: the CLI, SDK and API read and sync connections you've already made in the dashboard.

Why this stays private

open-banking.io is zero-knowledge. Our servers hold only your public key, so they can store your encrypted data but never read or decrypt it. No certificates to buy, no vendor onboarding — just ~EUR 3/month for full access to Postbank and every other supported institution.

Do I need a developer account to connect Postbank?

No. Connecting is done in the dashboard by any user. API keys and credentials.json are only for reading data in code afterwards.

Who can decrypt my Postbank transactions?

Only you. Decryption happens on your device with a private key that never leaves it, so neither we nor anyone else can read your data.

Up to 180 days per PSD2 authorisation, after which you re-approve access on Postbank's login screen.

Ready to link Postbank? Start at open-banking.io.