API Codex - Developer APIs

Real-time and historical foreign-exchange rates and currency conversion, backed by the European Central Bank (via Frankfurter) with an automatic open.er-api fallback. No upstream key required.

Convert any amount between 30+ major currencies, pull live or historical rates, and list every supported currency from a single clean JSON interface. Responses are edge-cached for low latency, making the API ideal for e-commerce pricing, expense tracking, fintech dashboards, and back-office reconciliation.

Get a free API key at dash.apicodex.io.

Features:

Convert: Convert an amount between two currencies at the latest rate
Latest Rates: Fetch the latest rates for a base currency, optionally filtered by symbols
Historical: Convert using rates from a specific past date
Currencies: List all supported currency codes and names

Real-time and historical foreign-exchange rates and currency conversion, backed by the European Central Bank (via Frankfurter) with an automatic open.er-api fallback. No upstream key required.

Get a free API key at dash.apicodex.io.

Features:

Convert: Convert an amount between two currencies at the latest rate
Latest Rates: Fetch the latest rates for a base currency, optionally filtered by symbols
Historical: Convert using rates from a specific past date
Currencies: List all supported currency codes and names

Currency / FX Conversion API

Currency / FX Conversion API