Sparkasse Hattingen API Access & Open Banking

Reaching your Sparkasse Hattingen accounts programmatically usually means wrestling with eIDAS certificates and a PSD2 sandbox. open-banking.io removes that entirely. It gives you a single, certificate-free path to your Sparkasse Hattingen data (BIC WELADED1HTG) — covering both business and personal accounts — while keeping the whole exchange zero-knowledge. Your figures are decrypted on your own device with a key that never leaves it, so open-banking.io only ever stores your public key and ciphertext it cannot read.

How to connect Sparkasse Hattingen

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 key pair is generated locally on your device the moment you do this.
  2. In the dashboard, search for Sparkasse Hattingen and choose the account type you want to link — business or personal.
  3. You are redirected to Sparkasse Hattingen's own secure login, where you approve access under PSD2. open-banking.io never sees your banking credentials.
  4. Your consent stays valid for up to 180 days, after which you simply re-approve on the bank's screen.

Once approved, your Sparkasse Hattingen accounts and transactions sync straight into your dashboard.

Access your data

Want your Sparkasse Hattingen data in code? That is an optional developer step you take after the connection exists. On 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. Every request carries the X-Api-Key header, and each response is decrypted locally with your own key. Note that the key alone returns only ciphertext — without your private key, nothing is readable. The CLI and SDK only read and sync connections you already made in the dashboard.

All of this runs for roughly EUR 3/month, with no certificates to buy or renew.

Is my Sparkasse Hattingen login shared with open-banking.io?

No. You authenticate directly on Sparkasse Hattingen's own consent screen. open-banking.io never receives your credentials.

Which Sparkasse Hattingen accounts can I connect?

Both business and personal accounts are supported under the same PSD2 flow.

How long does access last?

Consent runs for up to 180 days. When it expires, re-approve on the bank's login to continue syncing.

Start at open-banking.io.