Banque Populaire Grand Ouest Open Banking & API Access

Reading your Banque Populaire Grand Ouest data has never required a bank partnership, an eIDAS certificate, or a regulatory sandbox. With open-banking.io you connect the account once and your balances and transactions become available to view — and, if you want, to query in code. Everything is decrypted on your own device with a key only you hold, so nobody at open-banking.io can see inside your accounts.

Banque Populaire Grand Ouest (BIC CCBPFRPPNAN) is fully supported for both business and personal accounts, with PSD2 consent lasting up to 180 days before you renew it.

How to connect Banque Populaire Grand Ouest

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; only your public key ever leaves it.
  2. In the dashboard, pick Banque Populaire Grand Ouest from the list of 2,600+ supported banks and choose the account type — business or personal.
  3. You are redirected to Banque Populaire Grand Ouest's own secure login, where you approve access under PSD2. Your credentials are entered only on the bank's screen.
  4. Once you confirm, your accounts sync back into your dashboard, encrypted with your key.

That's the whole flow — no developer redirect and no third party ever handling your login.

Access your data

After the account is connected, 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 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. Every request carries the X-Api-Key header, and each response is decrypted locally with your key. An API key on its own only returns ciphertext — without your private key, the data stays unreadable.

At roughly EUR 3/month, this is a certificate-free, zero-knowledge alternative to building your own PSD2 stack.

Do I need a developer account or a certificate?

No. Connecting Banque Populaire Grand Ouest is done in the dashboard by approving consent on the bank's own screen. The API and CLI are purely optional extras.

Can open-banking.io read my transactions?

No. The service stores only your public key. Decryption happens on your device, so your data is never readable server-side.

How long does access last?

Banque Populaire Grand Ouest consent runs up to 180 days, after which you re-approve it from the dashboard in a few clicks.

Start at open-banking.io.