BiG API Access — Sync Banco de Investimento Global

Bring your Banco de Investimento Global (BiG) data into your own tools without wrestling with certificates, sandbox onboarding, or bank-by-bank paperwork. open-banking.io gives you a single EU/UK-wide API that talks to BiG on your behalf, so a personal or business account holder can pull live financial data into a dashboard, accounting stack, or internal app in minutes.

BiG is a Lisbon-based investment and retail bank (BIC BDIGPTPLXXX). Through our endpoints you authenticate once with BiG's own PSD2 interface and start syncing straight away.

How to connect BiG

  1. Create an open-banking.io account and grab your API key.
  2. Call our connect endpoint with the BiG institution ID.
  3. Redirect the account holder to BiG to approve access via their normal bank login.
  4. Receive the access token and begin fetching data — no eIDAS or QWAC certificate required.

What data you can access

  • Accounts — identifiers, currency, and account metadata for business and personal profiles
  • Balances — current and available amounts, refreshed on demand
  • Transactions — booked and pending entries with dates, counterparties, and references

BiG account access runs on a consent you renew with the customer, valid for up to 180 days before re-authorisation is needed. BiG is one of 2,600+ banks reachable through the same interface, so once you've integrated once, adding another institution is a one-line change.

Privacy by design

We operate on a zero-knowledge basis: credentials are entered only at BiG, never stored by us, and the connection is certificate-free — you skip the QWAC/QSEAL setup that traditional PSD2 access demands. You stay in control of tokens and data flow end to end.

Pricing

One flat plan of roughly EUR 3/month covers BiG alongside every other supported bank. No per-connection fees, no enterprise minimums.

FAQ

Do I need a banking licence or PSD2 certificate to use this?

No. open-banking.io handles the regulated access layer, and the connection to BiG is certificate-free.

How long does BiG access stay active?

Each consent lasts up to 180 days. When it expires, the account holder simply re-approves to keep the sync running.

Which BiG accounts are supported?

Both business and personal accounts held at Banco de Investimento Global can be connected.

Ready to start? Explore the docs and connect BiG at open-banking.io.