About ExchangeRate-API
A long-running currency conversion API with deep history.
ExchangeRate-API is a foreign-exchange rates service run by AYR Tech, launched in 2010. The product publishes indicative midpoint rates for 165 currencies used across roughly 200 countries, sourced from multiple feeds and served as JSON over a straightforward HTTPS endpoint. Standard, Pair Conversion and Supported Codes calls are open on the free tier, while Enriched Data (country codes, currency symbols, flag URLs) and Historical Data covering over thirty years are reserved for the paid Pro and Business plans.
The reason to land ExchangeRate-API in a warehouse is that a rate only matters when it is joined to a business event. One conversion call from a checkout, a quote tool or an ERP gives you a number for that one moment, but the same rate also priced the export invoice booked an hour earlier and the supplier payout that leaves tomorrow. Pulled into one place and stored per day and per currency pair, ExchangeRate-API becomes the single reference your billing system, your boekhouding and your sales tooling all read from, with timestamps and an audit trail that finance can defend.