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.

Built for a careful paid API rollout

The service keeps existing public endpoints compatible while the paid API foundation is introduced gradually.

Fiat rates for products

Serve USD-based exchange rates to extensions, websites, SaaS tools, and internal dashboards.

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.