Currency Exchange — entry 014 of 18
Frankfurter
Frankfurter aggregates and republishes daily reference rates from roughly 84 central banks, not solely the ECB, covering 200+ currencies with history back to 1948, and supports current, dated, and time-series conversion queries, including filtering to a specific source institution. It's free with no API key and no request quotas beyond abuse-prevention rate limiting, returns JSON by default plus CSV and streaming NDJSON, and now also ships an official self-hosting Docker image and an MCP server for AI-agent integration. The project's site and docs moved from frankfurter.app to frankfurter.dev, with the old domain now redirecting.
GreatAPIs Score
Embed this badge
<a href="https://greatapis.com/api/frankfurter/"><img src="https://greatapis.com/badge/frankfurter.svg" alt="Scored 100 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Endpoints
currencies1
GET/currenciesGet available currencies
| Name | In | Required | Type |
|---|---|---|---|
scope | query | no | string |
| Status | Description | Schema |
|---|---|---|
200 | Available currencies | — |
currency1
GET/currency/{code}Get a single currency
| Name | In | Required | Type |
|---|---|---|---|
code | path | yes | string |
| Status | Description | Schema |
|---|---|---|
200 | Currency details | CurrencyDetail |
404 | — | — |
providers1
GET/providersGet available data providers
| Status | Description | Schema |
|---|---|---|
200 | Available providers | — |
rate1
GET/rate/{base}/{quote}Get a single exchange rate pair
| Name | In | Required | Type |
|---|---|---|---|
base | path | yes | string |
quote | path | yes | string |
| Status | Description | Schema |
|---|---|---|
200 | Exchange rate | Rate |
404 | — | — |
422 | — | — |
503 | — | — |
rates1
GET/ratesGet exchange rates
| Status | Description | Schema |
|---|---|---|
200 | Exchange rates | — |
404 | — | — |
422 | — | — |
503 | — | — |
Try it
Developer reference
https://api.frankfurter.dev/v2No fixed quota — abuse-prevention rate limiting only
- GET/rates
- GET/rate/{base}/{quote}