The service from the New York Federal Reserve Bank provides historical data for foreign exchange transactions and exchange rates. The list of data available covers many of the world's currencies, with both spot and buying prices quoted at different times of day. The authoritative provider makes the data available for ingestion to automated processes that must compare currencies to calculate prices for cross-border transactions, in addition to historical research uses.
API methods support retrieval of regularly updated data formatted in compliance with the emerging Statistical Data and Metadata Exchange (SDMX) standard. URL-based access delivers data for specific currencies, with both 10 a.m. and noon quotes available for many frequently traded currencies.