Currency Exchange Rate Tracker API

A professional-grade Flask API that fetches both real-time and historical currency exchange rates via third-party APIs.
Built for financial dashboards, travel apps, analytics services, and internal finance tools.

💵 Features:

• GET /latest?base=USD&target=EUR — get latest rate
• GET /history?base=USD&target=EUR&days=7 — historical rates
• In-memory cache with TTL (10 min)
• ISO 4217 validation for currency codes
• CORS + rate limiting (10/minute)
• Uses exchangerate.host (can be swapped via .env)

📦 Works out of the box. Fully customizable.