Sparda-Bank Südwest API Access & Open Banking Guide

Sparda-Bank Südwest (BIC GENODEF1S01) serves members across Rheinland-Pfalz, Saarland and Hessen, but it ships no public developer API of its own. open-banking.io bridges that gap: it turns your PSD2 access rights into clean, structured account and transaction data — without certificates, eIDAS onboarding, or a bank sandbox application. Both business and personal Sparda-Bank Südwest accounts are supported, and a single consent stays valid for up to 180 days before you re-approve.

The design is deliberately zero-knowledge. When you sign up you set an encryption passphrase, and your keys are generated on your own device. open-banking.io stores only your public key, so its servers can never read or decrypt your Sparda-Bank Südwest balances — only you can, locally.

How to connect Sparda-Bank Südwest

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 (this creates your personal key pair on your device).
  2. In the dashboard, search for and select Sparda-Bank Südwest, then choose the account type — business or personal.
  3. You're redirected to Sparda-Bank Südwest's own secure login, where you approve access using your usual banking credentials (standard PSD2 consent).
  4. Once approved, your accounts sync back into the dashboard, ready to view.

That's the whole flow. You always authenticate on the bank's real login screen — open-banking.io never sees your Sparda-Bank Südwest password.

Access your data

Want the data programmatically? That's an optional step after your Sparda-Bank Südwest connection exists. On the Developers page, create an API key and export a credentials.json — it bundles the API key with your private decryption key. Then use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API directly. Requests carry the X-Api-Key header, and every response is decrypted locally with your own key. An API key alone only ever returns ciphertext — the private key that unlocks it never leaves your machine. The CLI and SDK read and sync existing connections; they don't create them.

All of this runs at roughly EUR 3/month, with no per-bank contracts or certificate fees.

Does open-banking.io store my Sparda-Bank Südwest login?

No. You authenticate only on Sparda-Bank Südwest's own consent screen, and open-banking.io holds just your public key.

Can I access business accounts?

Yes. Both business and personal Sparda-Bank Südwest accounts are supported.

Sparda-Bank Südwest consent lasts up to 180 days, after which you re-approve on the bank's login page.

Ready to start? Visit open-banking.io.