Currency Converter — OpenData / OpenFinance Integration

Primary Deliverables

• Protocol analysis report (mobile API, endpoints, auth, rate limits)
• OpenAPI (Swagger) specification for all endpoints
• Production-ready backend (Node.js / Python) implementing: /rates, /convert, /historical, /symbols, /ws
• Client SDKs (Node.js, Python, minimal JS snippet) and sample integration
• Offline sync module & delta snapshot generator
• Automated test scripts, Postman collection and CI hints
• Security & compliance checklist (data sources, attribution, caching rules)

Example API (pseudo)

GET /api/v1/rates?base=USD&symbols=EUR,JPY,BTC
Response: {
  'base':'USD',
  'timestamp':1678912345,
  'rates':{'EUR':0.9123,'JPY':152.12,'BTC':0.000038},
  'source':'aggregated:ECB,ExchangeA,ExchangeB'
}

POST /api/v1/convert
{from:'USD',to:'EUR',amount:100}
Response: {from:'USD',to:'EUR',amount:100,result:91.23,rate:0.9123,timestamp:...}

WebSocket: wss://api.example.com/ws/rates -> realtime rate deltas (delta-compressed)

Typical Integration Scenarios

Merchant pricing, travel apps, fintech dashboards, crypto wallets, point-of-sale multicurrency pricing, and white‑label FX widgets.

Technical Notes

• Aggregation & reconciliation: weighted median of multiple sources with fallbacks
• Caching strategy: TTL tiers, on-demand refresh, delta snapshots for mobile
• Auth: API keys + OAuth 2.0 optional for partner endpoints
• Rate limiting, billing hooks and usage quotas provided as middleware

Example integration snippets

// Node.js example (fetch rates)
const res = await fetch('https://api.yoursvc.com/api/v1/rates?base=USD&symbols=EUR,JPY');
const data = await res.json();
console.log(data.rates.EUR);

# Python example
import requests
r = requests.get('https://api.yoursvc.com/api/v1/convert', params={'from':'BTC','to':'USD','amount':0.01})
print(r.json())

Why choose our studio

We are a specialist technical studio focused on app interface integration and authorized API integration. Our team has deep fintech, mobile and protocol analysis experience. We deliver auditable, production-ready code, Open Data combiners and compliant OpenFinance connectors.

• Hands-on experience with FX, crypto and market data feeds
• Deliverables: source code, OpenAPI, Postman, CI tests
• Compliant approach to data licensing, caching and privacy
• Fast turnaround: typical first-pass delivery 5-12 business days

Contact & Next Steps

To start, provide: app package id (provided), target endpoints you need (convert, historical, websocket), expected QPS, and whether you require SDKs or hosted API. We can deliver a proposal within 48 hours.

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