Overseas App API Integration Services | Loans, Wealth Management and Microbank Apps

About Us

We are a technology services team specializing in App interface integration and authorized API connections, with years of fintech and mobile project experience. Our services include protocol analysis, interface refactoring, Open Data integration, third-party integrations, automated data delivery and comprehensive API documentation delivery, ensuring compliance, security and production readiness.

Compliance note: All engagements are based on client authorization, or public/authorized APIs or licensed data sources. We sign NDAs when required and comply with local laws and privacy protections.

Our Core Capabilities

Accounts & Identity: OAuth2, Token management, and multi-factor authentication integration.
Billing & Transactions: balance queries, transaction details, bulk export and reconciliation interfaces.
Loans & Interest Calculations: configurable loan calculators, repayment plans and fee breakdowns.
Investments & Savings: asset portfolio aggregation, NAV/valuation refresh, goal savings management.
Automation & Delivery: OpenAPI/Swagger documentation, Postman collections, Node.js/Python/Java sample code.
Cross-platform Support: network layer and authentication header guidance for Android/iOS to enable rapid backend/mobile integration.

Target App Scenarios & Implementation Highlights

Below are typical interface implementations and design points tailored to the target apps you provided. Each item includes API specifications, authentication details, and sample requests/responses.

ByajKhata: Implement interest ledger data synchronization, loan records queries, periodic interest calculation logic, and CSV/JSON export interfaces; supports customized interest rate rules and aging analysis. Supports local currency conversion, cost basis calculation and scheduled investment tasks (cron) delivery examples.
Interest Bahi Khata: Provide multi-currency interest calculation module, installment repayment planning, grouped statistics API and standardized export for accounting system integration.
SF Next: Implement account login, balance and transaction history queries, push-level change notifications, with anomaly alerts and retry strategies described.
RelaxBanking Mobile: Provide payment and transfer interface specifications, automatic bill matching, OAuth authorization flow and secure header handling examples to ensure smooth integration with core banking systems.
Ura Saccos Loan Calculator: Implement configurable loan parameters, equal/declining repayment algorithms, interest and late fee calculations, and REST endpoints for frontend consumption.
3Nickels: Invest, Budget, Save: Deliver investment portfolio aggregation, goal savings plans API, budget rule engine with automated deductions/reminders integration examples.
Los Héroes: Provide account management, policy/benefit inquiry and claims status interfaces with regional compliance fields and localized data formats.

Deliverables

Runnable API sample code (Node.js / Python / Java), with deployment instructions and test scripts.
Complete OpenAPI/Swagger docs and Postman collections, including header and authentication flow examples.
API test plans, integration guides and sample data export formats (CSV/JSON/XML).
Where necessary, data extraction and reverse engineering guidance; always based on proper authorization.

Technical & Security Details

Transport security: enforce HTTPS/TLS, certificate pinning and HSTS support.
Auth methods: supports OAuth2 authorization code, client credentials, JWT and API Key mixed schemes.
Idempotency design: idempotent keys, retry strategies and transaction rollback suggestions.
Observability: API tracing, error code taxonomy and monitoring/alerts integration (Prometheus/Grafana).
Compliance & Privacy: data minimization, encryption of sensitive fields and log masking practices.

Pricing & Timeline

Transparent pricing: base service starts at $300 (including requirements analysis and initial delivery); complex integrations priced per project.
Delivery cycle: typically 5-12 business days to deliver the first version; brokerages or multi-party settlement scenarios may adjust timeframes.
NDAs available and phased acceptance payments. Demonstrations can be provided before delivery to confirm features.

FAQ

What information do I need to provide?

Just provide the target App name and concrete requirements (e.g., exporting transactions, implementing a loan calculator, or integrating with a third-party payment), and we will assess authorization methods and provide a solution plan and quote.

Which platforms and regions are supported?

Supports Android/iOS API standardization and compliant integration for major regional apps (with emphasis on Latin America, South Asia and Southeast Asia markets).

How do you ensure compliance and data security?

All work is conducted only with client authorization or using public APIs, and NDA/compliance reviews can be provided. We follow privacy rules, TLS, least privilege, and data masking guidelines in delivered code.

Overseas App API Integration & API Integration Services