Caixa Popular API Access & Open Banking Data

Caixa Popular is a Valencian credit cooperative serving businesses and households across the Comunitat Valenciana. With open-banking.io you can bring your Caixa Popular accounts into one dashboard and, if you write code, read them programmatically — without EIDAS certificates, sandbox paperwork, or a bank data agreement.

open-banking.io is a zero-knowledge PSD2 service covering 2,600+ European banks. Your encryption keys are generated on your own device, so only you can turn your account data back into readable form. Caixa Popular is identified by BIC BCOEESMM159 (Banco Cooperativo Español group), and both business and personal account types are supported. A single access consent lasts up to 180 days before Caixa Popular asks you to re-approve.

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

  1. Sign up for open-banking.io and set your encryption passphrase. Your private key is created locally and never leaves your device.
  2. In the dashboard, search for Caixa Popular and choose whether you're linking a business or personal account.
  3. You're redirected to Caixa Popular's own secure login, where you authenticate and approve access on the bank's PSD2 consent screen.
  4. Once approved, your accounts and transactions sync back into your dashboard automatically.

Because approval happens on Caixa Popular's side, open-banking.io never sees your banking credentials.

Access your data

Programmatic access is an optional step you take after connecting. 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 you can 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. An API key on its own only ever returns ciphertext — the readable data exists only on your machine.

All of this runs for roughly EUR 3/month.

Do I need a certificate or bank agreement?

No. open-banking.io is certificate-free — you approve access directly on Caixa Popular's consent screen, no EIDAS certificate or bank contract required.

No. The service is zero-knowledge and stores only your public key, so it holds ciphertext it cannot decrypt. Only your device holds the private key.

How often do I re-authorise?

Caixa Popular consent lasts up to 180 days. After that you re-approve on the bank's login screen to keep your data syncing.

Ready to start? Visit open-banking.io.