Currencylayer
Currencylayer is a real-time and historical foreign exchange rate JSON API delivering bank-grade exchange rate data for 168 world currencies and precious metals, sourced from 15+ commercial-grade providers. The service is delivered through the APILayer marketplace under a freemium subscription model with refresh cadence ranging from hourly on Free up to 60 seconds on Enterprise tiers.
APIs
Currencylayer API
The Currencylayer REST API exposes six operations covering currency symbol discovery, real-time and historical rates, on-demand currency conversion, daily time-frame windows, an...
Capabilities
Features
Coverage of fiat currencies plus precious metals, sourced from 15+ commercial-grade providers.
Latest rates with refresh cadence ranging from hourly (Free) to 60 seconds (Enterprise and above).
End-of-day rates for any day since 1999, available on every plan including Free.
On-demand conversion between any two currencies at real-time or historical rates.
Daily rates between two arbitrary dates (max 365 days) for trend analysis.
Start rate, end rate, absolute change, and percentage change for a chosen window.
SSL-secured transport on Basic plan and above; Free is HTTP only.
Choose any of the 168 codes as the base currency on Basic plan and above.
One APILayer `apikey` works across Currencylayer and other APILayer marketplace APIs.
Aggregated from 15+ commercial-grade providers, suitable for finance and treasury workloads.
Use Cases
Convert prices into the shopper's local currency at checkout using /convert and /live.
Daily mark-to-market of multi-currency balances using /timeframe and /change.
Power in-app FX widgets, traveler wallets, and remittance quotes with /live.
Look up the official end-of-day rate for any historical transaction with /historical.
Pull windowed rate history with /timeframe to feed quant or BI models.
Reference an immutable end-of-day rate when auditing cross-border payments.
Expose live and historical rates to LLM agents via APILayer's MCP server pattern.
Integrations
Currencylayer is distributed via the APILayer hub; signup, billing, and key management share the marketplace.
Sister APILayer FX product with overlapping surface; commonly used interchangeably or for redundancy.
Cryptocurrency exchange rate API on the same APILayer platform.
Competing FX API that consumers benchmark Currencylayer against.
Free/community FX alternatives often evaluated alongside Currencylayer.
Server- and browser-side libraries paired with Currencylayer for conversion math.
Solutions
100 requests/month, hourly refresh, USD base only, HTTP only. Best for prototyping.
10,000 requests/month at $14.99/mo, HTTPS, source-currency switching, /convert endpoint.
100,000 requests/month at $39.99/mo, 10-minute refresh, /convert endpoint.
100,000 requests/month at $59.99/mo, 60-second refresh, /timeframe endpoint.
500,000 requests/month at $99.99/mo, 60-second refresh, /timeframe and /change endpoints.
Volume-based pricing, 60-second refresh, dedicated account team and priority support.