Fiat rates for products
Serve USD-based exchange rates to extensions, websites, SaaS tools, and internal dashboards.
Fiat and crypto exchange rate API
Currency Converter Plus
A lightweight exchange rate service for browser users and developers who need reliable fiat and crypto conversion data.
Free for everyone
Convert currencies without an account
Use current fiat and crypto rates in a fast browser-based calculator. Rates load once, then each conversion happens locally.
Browser extension
Keep currency conversion one click away
Install the published Currency Converter Plus extension for quick access while you browse. Choose the official store for your browser.
Built for a careful paid API rollout
The service keeps existing public endpoints compatible while the paid API foundation is introduced gradually.
Crypto assets with control
Manage enabled crypto assets in the backend and keep the public API response stable.
API keys and usage tracking
Create customers, issue API keys, and record daily usage before payment is connected.
Start with the current API
Use GET /v2/exchange for fiat rates and GET /v2/exchange_crypto for crypto rates. Legacy /v1 endpoints remain reserved for extension compatibility.