The goal is to support as many currencies as possible.
If I can find another source that includes CLP, it would be included in our list of supported currencies, but until then, unfortunately not. For instance, after you mentioned that you're looking for CLP data, I added the daily reference rates published by the Central Bank of Chile to our system. Can you tell us how you select the list of currencies? Do you anticipate adding other currencies to your list?ĭavid: Since my main aim for this service is to offer stable and reliable exchange rate data, I only include currencies when there is more than one data source for that currency code. I'm sad to see that you don't have Chilean pesos (another problem I need to solve). I'm currently working on a transparency project to compare and show the accuracy of this public reference rate blend against a proprietary data source so potential users can make more informed decisions on what type of currency data service is right for them.Ĭhris: I'm delighted that you've included Canadian dollars and Indian rupees, as that is one problem I need to solve. It also does acceptance checking to ensure the rates aren't wildly wrong (for instance an inverted data capture recording US dollars to CLP instead of CLP to USD) and weights different sources based on their historical accuracy. ExchangeRate-API collects the public reference rates from a number of central banks and then blends them to reduce the risk of outlying values. There are one or two other free and unlimited APIs, but these typically just serve the daily reference rates provided by the European Central Bank. This also makes starting to use it really fast-you literally just copy the endpoint URL and you're good to go. Thus, the main difference with our currency conversion API is that it's unlimited and requires no signup.
I'm also motivated by the thought that this data should be freely accessible to developers who want to build useful stuff even if they don't have a budget.
Best free currency converter api for free#
Over the years, I've tried a number of different approaches, but offering quality data for free has always proven the most popular. There are now around 20 such APIs offering quite a few different approaches.
(The interview has been edited slightly for clarity.) About ExchangeRate-APIĬhris: How is ExchangeRate-API different from other online exchange-rate services? What motivates you to provide this service?ĭavid: When I started ExchangeRate-API with a friend in 2010, we built and released it for free because we really needed this service for another project and couldn't find one despite extensive googling. Below the interview, you can find scripts and usage instructions. Recently, David over at reached out to me to say, "the free API you mentioned (Fixer) has been bought by CurrencyLayer and had its no-signup/unlimited access deprecated." He also told me, "I run a free API called that has the same JSON format as the original Fixer, doesn't require any signup, and allows unlimited requests."Īfter exchanging a few emails, we decided to turn our conversation into an interview. I showed how two exchange rate sites, fixer.io and (now ), could provide the data I needed, allowing me to convert between Indian rupees (INR) and Canadian dollars (CAD) using the former, and Chilean pesos (CLP) and Canadian dollars using the latter. Last year, I wrote about using the Groovy programming language to access foreign exchange rate data from an API to simplify my expense records.
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