Cajasieste API Access via Open Banking | open-banking.io

Building on top of Cajasieste no longer means wrestling with bespoke bank integrations. open-banking.io gives you a single, standards-based gateway to pull live Cajasieste account data into your app, ledger, or analytics stack — with consent handled the PSD2 way and none of the usual onboarding friction.

Whether you are reconciling business accounts or powering a personal finance tool, one integration covers Cajasieste (BIC BCOEESMM076) alongside 2,600+ other banks across the EU and UK.

How to connect Cajasieste

  1. Create an open-banking.io account and grab your API key.
  2. Call our unified endpoint and select Cajasieste from the supported institutions.
  3. Redirect the account holder to Cajasieste's own secure login to approve access.
  4. Receive a consent token and start querying — the same request shape works for every bank you add later.

What data you can access

  • Accounts — identifiers and metadata for business and personal accounts.
  • Balances — current and available figures, refreshed on demand.
  • Transactions — historical and incoming entries with amounts, dates, and counterparties.

Everything arrives in one normalised JSON model, so you write your parsing logic once rather than per bank.

Cajasieste supports both business and personal account types. A single authorisation stays valid for up to 180 days before the account holder needs to re-approve, keeping ongoing syncs uninterrupted within that window.

Privacy by design

open-banking.io is zero-knowledge: we relay authorised data between Cajasieste and your application without holding your customers' banking credentials. There are no eIDAS certificates to buy, register, or renew — we manage the regulatory plumbing so you can ship. Access flows only through consent the account holder grants directly at their bank.

Pricing

One flat plan, roughly EUR 3/month, unlocks Cajasieste and the entire 2,600+ bank network. No per-call surcharges, no setup fees, no certificate costs.

FAQ

Do I need a banking licence to use this?

No. open-banking.io operates the regulated access layer, so you consume the API directly without becoming a licensed provider yourself.

How often can I refresh Cajasieste data?

As often as your use case needs within the 180-day consent window; balances and transactions are fetched on demand at request time.

Does it work for both business and personal accounts?

Yes. Cajasieste exposes both account types through the API, using the same endpoints and data model.

Ready to integrate? Get started at open-banking.io.