Sparkasse Gelsenkirchen API Access & Open Banking
Pull your Sparkasse Gelsenkirchen balances and transactions into one place with open-banking.io, a certificate-free EU/UK open-banking service covering 2,600+ banks. Whether you hold a personal or business account (BIC WELADED1GEK), you can link it, keep it in sync, and — if you write code — read the data programmatically. What sets open-banking.io apart is its zero-knowledge design: your data is decrypted on your own device with a key only you hold, so the service never sees it in the clear.
How to connect Sparkasse Gelsenkirchen
Connecting happens entirely in the open-banking.io dashboard — there is no API call, code, or key involved in this step.
- Sign up for open-banking.io and set an encryption passphrase. Your keys are generated locally on your device.
- In the dashboard, pick Sparkasse Gelsenkirchen and choose your account type (personal or business).
- You are redirected to Sparkasse Gelsenkirchen's own secure login, where you approve access under PSD2 consent — valid for up to 180 days.
- Your accounts sync back into the dashboard, ready to view.
Because consent is granted directly on the bank's screen, open-banking.io never handles your Sparkasse Gelsenkirchen credentials.
Access your data
Once a connection exists, developers can optionally read it programmatically. On the Developers page, create an API key and export a credentials.json — this 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. Requests authenticate with the X-Api-Key header, and every response is decrypted locally with your key. Note that the CLI and SDK only read or sync existing connections — the actual bank link is always made in the dashboard. An API key on its own returns only ciphertext; without your private key, the data stays unreadable.
All of this runs for about EUR 3/month, with no eIDAS certificate or bank partnership required on your end.
Does open-banking.io store my Sparkasse Gelsenkirchen login?
No. You authenticate on Sparkasse Gelsenkirchen's own consent screen, and open-banking.io only holds your public key — never your credentials or readable data.
Can I connect a business account?
Yes. Both business and personal Sparkasse Gelsenkirchen accounts are supported; you select the type when adding the bank in the dashboard.
How long does access last before I re-approve?
PSD2 consent for Sparkasse Gelsenkirchen lasts up to 180 days, after which you re-approve on the bank's login to keep syncing.
Ready to start? Visit open-banking.io.