Partner API platform for the bank
BaaS, open banking, partner integrations — bank-as-API. Architecture of the platform layer with governance, monetisation, security.
Discuss Your ChallengeWhy the bank needs a partner API platform
Telecom wants to issue cards. Marketplace wants to split payments. Government portal wants to verify accounts. Each partner integration without a platform layer is a separate snowflake.
Partner API platform consolidates: single entry point, predictable contracts, scalable partner onboarding.
Structural components
API Gateway. Auth (OAuth, mTLS), rate limiting, monitoring.
Developer Portal. Documentation, sandbox, code samples, status pages.
API catalogue by domain: Accounts, Payments, Cards, Lending, KYC, FX.
Contracts and SLAs. Per partner tier. Differentiated.
Monetisation layer. Per-call billing, subscription, revenue share.
Security. Beyond auth: scopes, data masking, consent enforcement, audit.
Onboarding flow. Self-service registration, contract acceptance, sandbox access.
Banking-specific concerns
Regulatory licensing. BaaS requires regulatory framework — partner can or cannot consume specific APIs.
PCI compliance. Card APIs — strict scope requirements.
PII in response — minimisation principle, never expose more than the partner needs.
Rate limiting strict — partner abuse can cascade into core systems.
Sandbox isolated from production — no real customer data.
Where it usually breaks
API design legacy-driven. Endpoints return raw ABS data in 1990s format. Partners cannot consume.
Versioning absent. Change breaks partners synchronously.
Monetisation added later — partners upset.
Sandbox = production confusion — testing on real customers.
Compliance not verified per partner — regulator audit fails.
Operating model
Owner — Head of Open Banking / Head of Platform.
Teams: API product, API engineering, developer relations, partner success.
Routine — quarterly partner advisory board.
Related
- /en/solutions/banking-embedded-finance-platform/ — BaaS solution
- /en/architecture/banking-event-bus-architecture/ — event bus
- /en/insights/banking-open-banking-uz/ — open banking UZ
- /en/decisions/banking-baas-vs-direct/ — BaaS decision
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