Data sources
Rate-API draws its exchange rates from published sources. The institutions below license their data for reuse on condition that they are credited, so each credit is given here in the wording its licence asks for.
How often rates change
We check our sources every hour. A rate changes when its publisher releases a new one: for most currencies that is once per business day (the European Central Bank publishes at about 16:00 CET), so a rate can stay the same overnight, at weekends and on holidays. Daily history goes back to 1999 for the ~30 currencies the ECB publishes, and is shorter for the rest.
Credits
Credit lines are given in the language and wording of each licence.
- Credit
- Source: European Central Bank (ECB)
- Licence
- ECB disclaimer and copyright
- Free of charge
- The ECB euro foreign exchange reference rates may be obtained free of charge from the European Central Bank at ecb.europa.eu.
- What Rate-API changes
- The ECB publishes rates against the euro. Rate-API rebases them to the US dollar and computes cross rates from them: those figures are Rate-API's calculation, a modification of the ECB data, not rates published by the ECB.
- Credit
- Source: Banco Central de Chile, Base de Datos Estadísticos (BDE). The information is the property of the Banco Central de Chile.
- Licence
- BDE terms and conditions
- What Rate-API changes
- Changed: the CLF rate against the US dollar is Rate-API's own adaptation (dólar observado divided by the UF of the same day), not a figure published by the Bank.
- Credit
- Source: National Bank of Kazakhstan (nationalbank.kz)
- Licence
- NBK Data License
- What Rate-API changes
- Rate-API rebases the National Bank of Kazakhstan's official tenge rates to the US dollar.
- Credit
- Source: National Bank of Ukraine (bank.gov.ua), CC BY
- What Rate-API changes
- Changed: Rate-API rebases the NBU's official hryvnia rates to the US dollar.
- Credit
- Source: Superintendencia Financiera de Colombia - SUPERFINANCIERA, Bogotá D.C., Tasa de Cambio Representativa del Mercado (TRM)
- Dataset
- www.datos.gov.co/d/32sa-8pi3
- What Rate-API changes
- The TRM, Colombian pesos per US dollar, is served as published. Rates between the peso and other currencies are Rate-API's calculation.
- Credit
- Source: Banco Central de Reserva del Perú (BCRP)
- Licence
- BCRP Condiciones de Uso
- What Rate-API changes
- Rate-API uses the midpoint of the BCRP's daily interbank buying and selling averages (series PD04637PD and PD04638PD).
- Credit
- Source: Board of Governors of the Federal Reserve System, H.10 Foreign Exchange Rates
- What Rate-API changes
- Changed: Rate-API inverts the series quoted in US dollars per unit, so every rate reads as units per US dollar.
- Credit
- Source: Bank Negara Malaysia
- What Rate-API changes
- Rate-API rebases Bank Negara Malaysia's ringgit middle rates to the US dollar.
Data and information are subject to Terms of Use for BNM Datasets. Bank Negara Malaysia does not endorse Rate-API or its use of the data.
- Credit
- Source: the CNB
- Licence
- CNB Disclaimer & copyright
- What Rate-API changes
- The CNB declares these rates once a month, in Czech koruna, and each is valid for the following month. Rate-API converts them to US dollars with the CNB's own US dollar fixing for the same day: that conversion is Rate-API's calculation.
- Credit
- Source: U.S. Treasury, Treasury Reporting Rates of Exchange (fiscaldata.treasury.gov)
These rates are published quarterly; each value applies from the date the Treasury gives for it.
- Credit
- Fuente: INE, Índice de Precios al Consumidor, actualizada 2026
- Dataset
- calculadoraipc.ine.cl/
- What Rate-API changes
- Changed: Rate-API computes the UF from INE's CPI with the Banco Central de Chile's published method and divides the peso rate by it. The UF and the CLF rate are Rate-API's calculation, not figures published by INE.
Share-alike: the CLF rate, adapted from INE's CPI, is shared under the same licence, CC BY-SA 4.0. INE does not endorse Rate-API or its calculation.
Pegged currencies
Some currencies are fixed by law to another currency, such as the CFA francs to the euro or the Saudi riyal to the US dollar. Rate-API computes these from the official parity and the rate of the currency they are pegged to.
Rates are reference figures for information, not quotes you can trade at. Terms of Service