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The European fintech landscape is governed by strict regulations, particularly PSD2 (Payment Services Directive 2). Here's what you need to know about building compliant APIs.
PSD2 Requirements
The directive mandates:
- Strong Customer Authentication (SCA)
- Secure communication standards
- Third-party provider access to account data
Implementing OAuth2.0
We recommend using OAuth2.0 with PKCE for mobile applications and authorization code flow for web applications. Key considerations include:
- Token expiration and refresh strategies
- Scope management for granular permissions
- Audit logging for compliance
Proper implementation ensures both security and regulatory compliance while providing a seamless user experience.
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