Bankhaus Werhahn API Access – Germany Open Banking

Bring your Bankhaus Werhahn data into your own systems without wrestling with proprietary bank integrations. open-banking.io gives you one clean API to sync balances, transactions, and account details from this Neuss-based private bank (BIC WERHDED1XXX), so your accounting, treasury, or personal finance tooling always reflects what the bank actually holds.

How to connect Bankhaus Werhahn

  1. Create an account at open-banking.io and grab your API key.
  2. Call the connect endpoint with Bankhaus Werhahn's identifier (BIC WERHDED1XXX).
  3. Redirect the account holder to Bankhaus Werhahn to authenticate and approve access.
  4. Receive the authorised connection and begin pulling data straight away.

No eIDAS certificates, no sandbox paperwork, no per-bank onboarding — the same flow works across every institution we support.

What data you can access

  • Accounts — business and personal account records, including IBAN and currency.
  • Balances — current and available figures, refreshed on demand.
  • Transactions — booked and pending entries with counterparties, references, and dates.

A single customer consent stays valid for up to 180 days before re-authentication is required, so you can keep data flowing for months without repeated prompts. Both business and personal account types are covered. Beyond Bankhaus Werhahn, the same integration reaches 2,600+ banks across the EU and UK — build once, connect everywhere.

Privacy by design

We run a zero-knowledge architecture: credentials go directly to the bank and we never store them, so we cannot see or replay them. Access is certificate-free, removing the cost and delay of managing QWAC/QSEAL certificates yourself. You stay in control of what each connection can read.

Pricing

Flat, predictable pricing from around EUR 3/month — no setup fees and no per-call surprises, whether you connect one account or scale across the whole network.

FAQ

Is Bankhaus Werhahn business and personal banking supported?

Yes. Both business and personal account types can be linked and synced through the same endpoints.

How long does a Bankhaus Werhahn connection last?

Each consent remains active for up to 180 days, after which the account holder simply re-authenticates to renew access.

Do I need my own banking certificates?

No. open-banking.io is certificate-free — there are no eIDAS certificates to obtain, host, or renew on your side.

Ready to sync Bankhaus Werhahn data? Get started at open-banking.io.