Crédit Mutuel du Sud-Ouest API Access | Open Banking

Pulling live data out of Crédit Mutuel du Sud-Ouest (CMSO) usually means wrestling with PSD2 sandboxes, eIDAS certificates and per-bank onboarding. open-banking.io removes all of that. One integration lets you read account information from CMSO alongside 2,600+ other banks across the EU and UK, so a single connection covers your entire European footprint.

Whether you are building accounting automation, a treasury dashboard or a personal-finance app, you get a normalised feed of Crédit Mutuel du Sud-Ouest data without maintaining any bank-specific plumbing.

How to connect Crédit Mutuel du Sud-Ouest

1. Create your open-banking.io account and grab an API key.
2. Select Crédit Mutuel du Sud-Ouest from the supported-bank directory.
3. Redirect the account holder to CMSO to authenticate and approve access.
4. Receive the consent token and start calling the accounts, balances and transactions endpoints.

No certificates to provision, no direct contract with the bank — the hosted flow handles the regulated handshake for you.

What data you can access

• Accounts — business and personal account details and identifiers.
• Balances — current and available balances, refreshed on demand.
• Transactions — dated, categorised transaction history with counterparty information.

Consent and coverage

Crédit Mutuel du Sud-Ouest supports both business and personal accounts. A single customer authorisation stays valid for up to 180 days, after which the account holder simply re-approves. The same request shape works identically across every other bank on the network, so extending beyond CMSO takes no extra code.

Privacy by design

open-banking.io is zero-knowledge: credentials are entered directly with the bank and never touch our servers. The platform is certificate-free, so you skip the eIDAS/QWAC overhead entirely and keep sensitive data out of your own infrastructure.

Pricing

One flat plan of roughly EUR 3/month covers access to Crédit Mutuel du Sud-Ouest and every other supported institution — no per-connection fees, no enterprise minimums.

Frequently asked questions

Do I need my own PSD2 licence to connect CMSO?

No. open-banking.io operates the regulated access layer, so you can read Crédit Mutuel du Sud-Ouest data without holding your own licence or certificates.

Can I connect both business and personal CMSO accounts?

Yes. Both account types are supported through the same authorisation flow and endpoints.

How often does consent need renewing?

Each approval lasts up to 180 days. When it lapses, the account holder re-authenticates once to resume syncing.

Ready to start? Explore the docs and connect Crédit Mutuel du Sud-Ouest at open-banking.io.