Our Service Overview
We are a technology team specializing in App API integration and authorized API integration, skilled in protocol analysis, API refactoring, Open Data integration, and third-party interface orchestration. We support Android and iOS, delivering runnable samples, OpenAPI documentation, and automated test scripts.
Compliance Statement: All work is conducted based on client authorization or within the scope of publicly available/authorized APIs (Open Data / Authorized Interfaces). Strictly follow local privacy and data protection regulations; where necessary we can perform compliant reverse engineering and protocol reconstruction to realize interfaces, while safeguarding sensitive terms.
Core Capabilities
- Protocol analysis and authorization workflows (OAuth2, JWT, mTLS, certificate binding)
- Transaction records, balance inquiries, recharge/withdrawal and transfer API standardization
- Crypto currency and fiat exchange channel integration, risk controls and limit checks
- OpenAPI/Swagger documentation, Postman collections and one-click deployment scripts
- Data protection aligned with local regulations, minimal logging and privacy-preserving policies
Target App Integration Examples & Functional Implementations
Below are integration suggestions and delivery points tailored to the target apps you provided. Each implementation can be extended to runnable API source code and comprehensive documentation.
- Square Invoices Beta: Create, send, and lifecycle manage invoices; supports templates, tax rates, and installment billing; provides webhook callbacks (payment confirmation, invoice due) and PDF export; idempotent operations and status synchronization.
- Present Value Calculator: Financial calculator API offering present value, future value, IRR, discount rate, and installment calculations; supports multi-currency and precision settings; returns amortization schedules, sensitivity analysis data and input validation rules.
- RechDot – Recharge & Cashback: Recharge interface for mobile top-ups; supports carrier routing and balance validation; implements cashback rules engine, cashback accounting interface and asynchronous notifications; provides recharge status queries and duplicate request protection.
- HAS YILDIZ SARRAFİYE: POS and inventory interfaces for retail/jewelry merchants; includes product barcodes, weight-based pricing, gold price updates, sales invoices and returns processing; supports member points, discount codes and multi-channel order synchronization.
- Smart book Долги под контролем: Personal debt and receivables management synchronization interface; provides loan records import/export, reminder schedules, repayment plan generation and multi-party reconciliation; implement local encrypted storage and cloud sync (with user authorization).
- Halifax Mobile Banking: Bank-grade account interfaces including account listings, balances and transaction details, domestic/international transfers, scheduled payments and bill payments; supports Open Banking standards, SCA and secure session management strategy.
Deliverables (Examples)
- Runnable backend example code (Node.js / Python / Java) with deployment instructions
- OpenAPI/Swagger documentation, Postman requests collection, with header and authentication examples
- API authentication and security design documents (OAuth2 / JWT / mTLS, etc.)
- Automation tests and integration test plans, including common exception scenarios
- Operations recommendations and quick-reference manuals (logging, monitoring, rate limiting and idempotency strategies)
Pricing & Service Model
- Starting at $300 (for small interface encapsulation or sample implementations), final quote tailored by complexity and compliance needs
- Support delivering usable outputs first, then payment after acceptance; NDA and authorization statements
FAQ
What information should the client provide?
Please provide the target App name, desired interface functionalities (e.g., balance query, recharge, withdrawal, transaction details), and whether there is API documentation or authorization credentials. If connecting to third-party KYC/payments, please also provide access details.
Is Open Banking / PSD2 integration supported?
Yes. We are familiar with Open Banking processes, OAuth2 authorization code, SCA requirements and certificate frameworks; can coordinate with banks or third parties for compliant integration.
Is maintenance provided after delivery?
Yes, on-demand maintenance and upgrades, including interface changes adaptation, bug fixes and performance optimization.
Contact Us
Ready with target App name and requirements? Click below to view contact information and submit your request; we will respond within 24 hours.