KB Star Banking API Integration and Open Finance Solutions

Based on OpenData / OpenFinance for protocol analysis, card management, transaction and reconciliation automation integration

Starting at $300 — Delivered upon satisfaction
OpenBanking · Protocol Analysis · Data Integration · Compliance Deliverables

Securely connect KB Star Banking's accounts, cards, and transactions capabilities to your platform

We provide end-to-end services from mobile protocol analysis to runnable APIs and documentation, supporting transaction synchronization, statement export, and account management scenarios for both enterprise and individual use.

Mobile login & authentication — supports KB national authentication / mobile verification, fingerprint/FaceID, SmartOTP scenarios for session establishment and token refresh.
Accounts & cards management — activate/deactivate cards, card limits, bind/unbind cards, card payment status syncing and real-time notifications.
Transactions & statements export — provide transaction details with time ranges, accounts, cards or transaction types; export to JSON/CSV/Excel.
Notifications & push verification — real-time alerts, push verification and security logs; support transaction traceability and compliance auditing.
Contact us View deliverables

Deliverables (Examples)

Standard deliverables

  • OpenAPI/Swagger compatible interface documentation
  • Protocol and authorization flow analysis report (including SmartOTP / fingerprint)
  • Runnable API source code (Node.js / Python) with deployment instructions
  • Automated tests and Postman collections
  • Compliance guidance (privacy, data minimization, logging and audit trails)

Interface sample: transaction retrieval (pseudo-code)

// POST /api/v1/rakuten/transactions
// Authorization: Bearer <ACCESS_TOKEN>
{
  'account_id': 'user123@rakuten',
  'start_date': '2025-10-01',
  'end_date': '2025-10-31',
  'type': 'CARD',
  'page': 1,
  'per_page': 100
}

Response 200 OK
{
  'status': 'OK',
  'page': 1,
  'total_pages': 2,
  'transactions': [
    {
      'id': 'RKC-20251005-0001',
      'date': '2025-10-05T14:12:00+09:00',
      'amount': -9800,
      'currency': 'JPY',
      'merchant': 'BookStore Tokyo',
      'category': 'Books',
      'installments': null,
      'status': 'SETTLED'
    }
  ]
}

Delivery timeline

Small-scale integration (login + transaction export): 5–10 business days. Medium complexity (Direct Debit management, export templates, compliance review): 10–20 business days. Complex scenarios or third-party approvals may take longer.

Core advantages

  • Compliance-first: design access in line with UK PSD2, GDPR and industry best practices
  • Deliverable, auditable API implementations with data minimization
  • Supports Android / iOS cross-platform protocol analysis and SDK packaging
  • Transparent pricing with pay-on-delivery model

API integration points (quick guide)

  1. Provide target app identity and required features (e.g., card management, transaction export, auto login).
  2. Preferred authorization path: official OpenBanking/PSD2 or customer consent-based flows; if unavailable, we propose a compliant protocol analysis approach to obtain necessary authorization info.
  3. Design phase: generate OpenAPI specs and authentication workflow (2–4 days).
  4. Development & testing: implement API, integration tests, and security audits (3–10 days).
  5. Delivery & deployment: deployment scripts, documentation, sample code and maintenance guidance.

About our studio

We are a technology studio focused on mobile app protocol analysis and Open Finance/Open Banking integration. Our team comes from banking IT, payment gateways and regulatory compliance backgrounds, delivering compliant, maintainable API integrations.

  • Experience with OpenAPI, OpenID Connect, OAuth2, PSD2 compliance workflows
  • Deliver OpenAPI docs, SDKs, test plans and deployment guidance
  • NDA options, compliance assessments and data privacy guidance available
  • Transparent pricing: starting at $300, with a buy-before-pay option on delivery

Contact

Ready to start? Please provide the target App name and integration requirements (e.g., account sync / transactions / Direct Debit) and we will respond within 24 hours with an initial plan and quote.

Visit Contact Page

📱 Rakuten Card Original App — Function Overview (collapsed)

App package: com.rakuten.card.app

Overview:

Rakuten Card official app provides convenient credit card management and member services: biometric login, bill details, spend adjustments, campaigns and Rakuten Points inquiries, campaign registrations, and quick access to Rakuten Group financial services. The app centralizes bill amounts, withdrawal accounts, points balance, campaign information, and offers budgeting features with quick access to Rakuten Pay.

  • Biometric login (fingerprint/face) and PIN protection
  • Bill details and requested amounts view, installment management
  • Campaigns/Points upgrades information push and registration
  • Budgeting feature: automatic monthly income/expense categorization
  • Rakuten Pay quick access and points linkage
  • Help docs and member pages (Rakuten e-NAVI binding)

Note: This page is a technical integration example to illustrate our interface integration capabilities for Rakuten Card; actual implementation will be based on client authorization and partner requirements.