Frankfurter

API

Free Currency Exchange Rates & Conversion API

Overview

Frankfurter is a RESTful API offering real-time and historical currency exchange rates, conversion, and time series data sourced from the European Central Bank (ECB) and trusted financial providers. Key endpoints include /latest (current rates), /convert (instant currency conversion), /historical (past rates), and /timeseries (rate trends over periods). Responses are in JSON format, supporting over 170 currencies. Ideal for integrating into financial apps, e-commerce platforms (multi-currency pricing), analytics tools, or personal finance trackers—no authentication required for basic access.

Example Integration (JavaScript)

script.js JS


fetch('https://www.frankfurter.app/docs')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON Response Format
No Authentication Required
ECB-Sourced Reliable Data
Currency Conversion
Historical Rates
Time Series Data

Frequently Asked Questions

? Is Frankfurter free to use?

Yes, Frankfurter is completely free for both personal and commercial use with no hidden charges.

? Does it require an API Key?

No, Frankfurter does not require an API key—all endpoints are publicly accessible without authentication.

? What is the response format?

All responses from Frankfurter are in JSON format, which is easy to parse and integrate into most applications.

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Tool Info

Pricing Free

Category Currency Exchange

Platform Public API

Pros

⊕ Completely Free for All Uses
⊕ No API Key Needed
⊕ Supports 170+ Currencies
⊕ Simple & Intuitive Endpoints
⊕ Time Series for Trend Analysis

Cons

⊖ Rate Limits Apply to High-Volume Requests
⊖ No Service Level Agreement (SLA)
⊖ Rates Sourced Primarily from ECB (Limited Exotic Currencies)