Banca March API Access & Open Banking Data | open-banking.io

Banca March is one of Spain's oldest family-owned private banks, and if you keep business or personal accounts there, open-banking.io lets you pull balances and transactions into one place without wrestling with eIDAS certificates or a PSD2 sandbox. It is a certificate-free, zero-knowledge service covering 2,600+ EU and UK banks: your account data is encrypted on your own device and decrypted locally with a key that never leaves you. Banca March's servers see a normal PSD2 consent; open-banking.io's servers only ever hold your public key.

How to connect Banca March

Connecting happens entirely inside 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 key pair is generated locally on your device at this moment.
  2. In the dashboard, search for Banca March and choose the account type you need — business or personal.
  3. You are redirected to Banca March's own secure login, where you approve access under PSD2. open-banking.io never sees your banking credentials.
  4. Your selected accounts sync back into the dashboard. Consent lasts up to 180 days, after which you simply re-approve on Banca March's screen.

Access your data

Once the connection is live, reading it programmatically is an optional developer step. On the Developers page, create an API key and export a credentials.json — this bundles the API key plus your private decryption key. From there use the CLI (openbanking accounts, openbanking transactions, openbanking sync), an SDK, or the REST API. Every request carries the X-Api-Key header, and each response is decrypted locally with your own key. The API key alone returns only ciphertext — without your private key, nothing is readable. Banca March's identifier for reconciliation is BIC BMARES2MXXX.

FAQ

Do I need an eIDAS certificate for Banca March?

No. open-banking.io is certificate-free — you approve access directly on Banca March's PSD2 consent screen, nothing more.

Can open-banking.io read my Banca March transactions?

No. The service is zero-knowledge and holds only your public key. Data is decrypted on your device with a private key only you possess.

What does it cost?

Around EUR 3 per month for access across all 2,600+ supported banks, including Banca March.

Start at open-banking.io.