The Frankfurter API tracks foreign exchange references rates published by the European Central Bank. The data refreshes around 16:00 CET every working day.
Frankfurter integrates seamlessly with libraries like Money.js and Dinero.js.
The API is organised around paths that designate the requested date or date range.
This endpoint returns the latest rates.
GET /latest HTTP/1.1
Rates quote against the Euro by default. You can quote against other
currencies using the from parameter.
GET /latest?from=USD HTTP/1.1
to limits returned rates to specified values.
GET /latest?to=USD,GBP HTTP/1.1
This endpoint returns historical rates for any working day since 4 January 1999.
GET /1999-01-04 HTTP/1.1
You can again tweak the response using the from and
to parameters.
This endpoint returns a set of historical rates for a given time period.
GET /2020-01-01..2020-01-31 HTTP/1.1
If you omit the final date, Frankfurter returns all dates up to the present.
GET /2020-01-01.. HTTP/1.1
With a full list of currencies, the response grows large in size. For
better performance, use the to parameter to limit result
to rates you are interested in.
GET /2020-01-01..?to=USD HTTP/1.1
Frankfurter returns all data points for up to 90 days. Above that, it starts sampling by week or month based on the breadth of the date range.
You can convert any value between currencies using the above endpoints
in combination with the amount parameter.
Below, we convert 10 British Pounds to US Dollars.
const host = 'api.frankfurter.app';
fetch(`https://${host}/latest?amount=10&from=GBP&to=USD`)
.then(resp => resp.json())
.then((data) => {
alert(`10 GBP = ${data.rates.USD} USD`);
});
A better approach is to fetch rates once and convert client-side using Money.js or Dinero.js.
This endpoint gets a list of available currency symbols along with their full names.
GET /currencies HTTP/1.1
If you prefer to self-host, you can install Frankfurter in a few minutes.
Run Frankfurter in the environment of your choice with Docker.
Frankfurter provides a Docker image via Dockerhub that can be used for deployments on any system running Docker. The following one-liner starts a Frankfurter container with an existing PostgreSQL server running on the host or elsewhere.
docker run -d -p 8080:8080 \
-e "DATABASE_URL=<postgres_url>" \
--name frankfurter hakanensari/frankfurter
This launches a Frankfurter instance on port 8080. Once the app starts, it automatically builds the database, populating it with data from the European Central Bank.
Post an issue on GitHub.