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. Every plan receives the same rate freshness and history; paid plans increase throughput and monthly volume.
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.