Exchange-rate data that explains itself
exchangerate.dev is an indicative foreign-exchange rate API for developers. It is operated by Nusantara Ventures, LLC.
Why it exists
A rate without its source and update time is incomplete. We built exchangerate.dev so an application can retrieve a rate and also know whether it is an intraday observation or a daily reference, when the underlying data changed, whether the interbank market is open, and whether a cross was derived.
The REST API and MCP server expose the same data. Plans share history and one feed; Free rates arrive 15 minutes late, paid rates live with higher quotas.
What the rates are for
The rates are designed for software, dashboards, analytics, research, accounting references, and conversion estimates. They are indicative: exchangerate.dev is not a bank, broker, exchange, or source of record, and its rates are not executable quotes for settlement, payments, or regulated trading.
The exact sourcing, freshness, derivation, and historical-data rules are documented in the data methodology.
How we publish
- Product limits and prices are generated from the same tier configuration the API enforces.
- Rate pages show source, market-session, and update-time context instead of presenting every observation as equally fresh.
- Research pages separate measured results from methodology and label assumptions, observation windows, and limitations.
- Material corrections update the page and its modified date; no customer logos, testimonials, or benchmark rankings are published without evidence.
Contact
Questions about the API, data methodology, or a correction can be sent to hello@exchangerate.dev.