WiZink Open Banking & API Access | open-banking.io

Reach your WiZink accounts without chasing a bank sandbox, an eIDAS certificate, or a regulator licence. open-banking.io is a PSD2 aggregation service covering 2,600+ European banks, and WiZink (BIC POPLESMMXXX) is one of them. Both business and personal WiZink accounts are supported, and a single approval keeps your data flowing for up to 180 days before you re-confirm.

The design is zero-knowledge from the start: your encryption keys are generated on your own device, and open-banking.io stores only your public key. That means the service can relay your WiZink ciphertext but never read it — only you hold the key that turns it back into balances and transactions.

How to connect WiZink

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

  1. Sign up and set an encryption passphrase; your private key is created locally and never leaves your machine.
  2. In the dashboard, choose WiZink and select the account type — business or personal.
  3. You are redirected to WiZink's own secure login, where you approve access on the bank's PSD2 consent screen.
  4. Your WiZink accounts sync back into your dashboard, ready to view.

Because approval takes place on WiZink's own domain, your credentials are only ever seen by the bank.

Access your data

Want WiZink data in your own code? That is an optional step you take after connecting. On the Developers page, create an API key and export a credentials.json — it bundles the API key with your private decryption key. From there:

  • CLI: openbanking accounts, openbanking transactions, openbanking sync
  • SDK or REST API: authenticate with the X-Api-Key header

Every response is decrypted locally with your own key. An API key alone returns only ciphertext — without your private key it stays unreadable, even to open-banking.io. Note the CLI and SDK only read and refresh existing connections; there is no connect command.

FAQ

Do I need a certificate or a developer account with WiZink?

No. open-banking.io is certificate-free. You sign up, set a passphrase, and approve access on WiZink's consent screen — nothing to file with the bank.

Up to 180 days. After that you simply re-approve in the dashboard to keep syncing.

What does it cost?

Around EUR 3/month, covering WiZink and every other supported bank on your account.

Start at open-banking.io.