Sparkasse Hegau-Bodensee API Access & Open Banking

Reaching your Sparkasse Hegau-Bodensee account data usually means wrestling with PSD2 certificates and sandbox paperwork. open-banking.io removes that barrier: it links the Singen-based Sparkasse (BIC SOLADES1SNG) through a licensed PSD2 connection, then hands you clean, decrypted account and transaction data. Whether you hold a business or personal account, both are supported, with consent lasting up to 180 days before you re-approve.

The key difference is privacy. open-banking.io is zero-knowledge: your data is decrypted locally with a key only you hold, and the service stores only your public key. No eIDAS certificate, no bank sponsorship, no server that can read your statements.

How to connect Sparkasse Hegau-Bodensee

Connecting happens entirely in 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 on your own device, so the passphrase never leaves it.
  2. In the dashboard, search for Sparkasse Hegau-Bodensee and choose your account type (business or personal).
  3. You are redirected to Sparkasse Hegau-Bodensee's own secure login, where you approve access on the bank's PSD2 consent screen.
  4. Your accounts sync back into the dashboard, ready to view — valid for the 180-day consent window.

Access your data

Once the 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 own key. The CLI and SDK only read or sync connections you already approved in the dashboard — they never create one.

At around EUR 3/month, it is a low-cost path to Sparkasse Hegau-Bodensee data for bookkeeping, reconciliation, or personal finance tools.

Do I need a PSD2 certificate?

No. open-banking.io is certificate-free — you approve access directly on Sparkasse Hegau-Bodensee's login screen and never touch eIDAS paperwork.

Can open-banking.io read my Sparkasse Hegau-Bodensee data?

No. The system is zero-knowledge. It holds only your public key, so stored data stays encrypted; decryption happens on your device with a key only you hold.

Does an API key alone return my transactions?

No. An API key returns only ciphertext. Readable data requires your private decryption key from credentials.json, which stays on your machine.

Start at open-banking.io.