Gránit Bank API Access | Sync Accounts via Open Banking

Pull live data from your Gránit Bank accounts into your own systems without wrestling with eIDAS certificates or bespoke bank integrations. open-banking.io gives you a single, standards-based gateway to Gránit Bank — Hungary's pioneering digital bank (BIC GNBAHUHBXXX) — so accounting tools, dashboards, and treasury workflows stay continuously in sync.

How to connect Gránit Bank

1. Create an open-banking.io account and grab your API key.
2. Call the connect endpoint and select Gránit Bank from the Hungarian bank list.
3. Send your customer through Gránit Bank's own secure login to approve the consent.
4. Receive an access token and begin reading account data straight away.

What data you can access

• Accounts — identifiers and metadata for both business and personal Gránit Bank products.
• Balances — current and available figures, refreshed on demand.
• Transactions — dated, categorisable entries for reconciliation and reporting.

Consent and coverage

Gránit Bank supports both business and personal account access. A single customer authorisation stays valid for up to 180 days before a straightforward renewal is needed. Gránit Bank is one of 2,600+ institutions reachable through the same open-banking.io interface, so adding banks across the EU and UK never means new plumbing.

Privacy by design

The platform is zero-knowledge: we never hold your users' banking credentials, and there are no eIDAS or QWAC certificates for you to purchase, host, or rotate. Authentication happens entirely on Gránit Bank's side, and data flows straight through to you.

Pricing

Flat, predictable access from roughly EUR 3 per month — no per-call surprises and no certificate overhead to budget for.

FAQ

Do I need my own eIDAS certificate for Gránit Bank?

No. open-banking.io is certificate-free, so you skip the QWAC/QSEALC setup entirely and connect through our shared, licensed infrastructure.

Can I access both business and personal Gránit Bank accounts?

Yes. Both account types are supported through the same API, with the account holder approving access via Gránit Bank's secure flow.

How often must consent be renewed?

Gránit Bank permits consent lifetimes of up to 180 days. When a consent nears expiry, the customer simply re-authorises to keep the connection live.

Ready to start syncing Gránit Bank data? Explore the docs and sign up at https://open-banking.io.