Sparkasse Iserlohn API Access via Open Banking

Pulling live data out of Sparkasse Iserlohn no longer means scraping screens or wrangling bank-issued certificates. With open-banking.io you connect once and keep business and personal accounts in sync — balances, statements and transaction history flowing straight into your own tools, spreadsheets or accounting stack.

The bank sits behind the same standardised PSD2 interface as 2,600+ other institutions across the EU and UK, so the integration you build here is the integration you reuse everywhere else.

How to connect Sparkasse Iserlohn

1. Create an open-banking.io account and open the dashboard.
2. Search for Sparkasse Iserlohn (BIC WELADED1ISL) in the bank picker.
3. Choose the account you want to link — business or personal.
4. Approve the connection in Sparkasse Iserlohn's own online-banking login. Credentials go to the bank, never to us.
5. Start reading data through the API or export it wherever you need it.

What data you get

Once consent is granted you can retrieve:

• Accounts — IBANs, account types and holder details
• Balances — current and available, refreshed on demand
• Transactions — booked and pending entries with full remittance information

Consent and coverage

Sparkasse Iserlohn grants a maximum consent window of 180 days, one of the longer periods available, so you re-authorise roughly twice a year rather than every few weeks. Both business and personal account types are supported through the same flow.

Privacy by design

open-banking.io is zero-knowledge: your login stays between you and Sparkasse Iserlohn, and we never store banking passwords. There are no eIDAS certificates to buy, register or renew — the platform handles regulatory access on your behalf, so you skip the paperwork that usually blocks self-built PSD2 projects.

Pricing

One flat plan of roughly EUR 3 per month covers access to Sparkasse Iserlohn and every other bank in the network. No per-call fees, no per-connection surcharge.

Is a bank certificate required?

No. open-banking.io is certificate-free — you never touch eIDAS or QWAC certificates.

How long does a connection last?

Sparkasse Iserlohn permits consent for up to 180 days, after which you simply re-approve in the bank's login screen.

Can I link both business and personal accounts?

Yes. Both account types at Sparkasse Iserlohn work through the same connection flow.

Ready to start? Connect Sparkasse Iserlohn today at open-banking.io.