Sparkasse Herford API Access & Open Banking Data

Reach the account data behind Sparkasse Herford without wrestling with eIDAS certificates, sandbox registrations or a PSD2 TPP licence. open-banking.io is a zero-knowledge bridge to 2,600+ EU and UK banks, and Sparkasse Herford (BIC WLAHDE44XXX) is one of them. Both business and personal accounts are supported, and a single approval keeps data flowing for up to 180 days before you renew.

Everything is decrypted on your own device. When you first sign up you set an encryption passphrase, and your keys are generated locally — open-banking.io's servers only ever hold your public key, so they physically cannot read your balances or transactions.

How to connect Sparkasse Herford

Connecting happens entirely in the open-banking.io dashboard — there is no API call, code snippet or key involved in this step:

  1. Create an open-banking.io account and set your encryption passphrase (this generates your private key on your device).
  2. In the dashboard, search for Sparkasse Herford and choose the account type you hold — business or personal.
  3. You are redirected to Sparkasse Herford's own secure login, where you approve access under PSD2. Your credentials are entered only on the bank's site.
  4. Once approved, your accounts sync back into the dashboard, ready to view. The consent stays valid for up to 180 days.

Access your data

If you're a developer, reading the data programmatically is an optional step you take after connecting. Open the Developers page, create an API key, and export a credentials.json — it 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. An API key on its own only ever returns ciphertext — without your key, the data stays sealed. Note the CLI and SDK only read and sync existing connections; the bank itself is always linked in the dashboard.

FAQ

Do I need a developer account to use Sparkasse Herford here?

No. Viewing your synced accounts in the dashboard needs nothing technical. API keys and credentials.json are only for reading data programmatically.

Can open-banking.io see my Sparkasse Herford transactions?

No. It's zero-knowledge — data is encrypted with keys only you hold, and servers store just your public key.

How long does access last?

Up to 180 days per approval, after which you re-confirm consent on Sparkasse Herford's login screen.

Start at open-banking.io — around EUR 3/month, no certificates required.