How to Integrate EURIBOR 3-Month Data into Your App: Complete API Guide

Introduction

In the fast-paced world of finance, accurate and timely interest rate data is crucial for developers, economists, and financial analysts. The EURIBOR (Euro Interbank Offered Rate) 3-Month rate is a key benchmark for various financial products, including loans and derivatives. Integrating EURIBOR 3-Month data into your application can enhance its functionality and provide users with valuable insights. This guide will walk you through the process of integrating EURIBOR 3-Month data using the Interest Rates API from interestratesapi.com.

Understanding the Interest Rates API

The Interest Rates API provides a comprehensive set of endpoints to access various interest rate data, including central bank rates, interbank rates, and historical data. This API is particularly useful for developers building fintech applications, as it allows for seamless integration of financial data into their systems.

Getting Started with the API

Before diving into the integration process, ensure you have access to the Interest Rates API. The base URL for all API requests is:

https://interestratesapi.com/api/v1/

All requests to the API must use the GET method and require an api_key query parameter for authentication. This guide will cover the following endpoints:

• /symbols
• /latest
• /historical
• /timeseries
• /fluctuation
• /ohlc
• /convert

1. Fetching Available Symbols

The first step in integrating EURIBOR 3-Month data is to fetch the available symbols from the API. This will help you confirm that the EURIBOR_3M symbol is available for use.

Endpoint: /api/v1/symbols

This endpoint retrieves a catalogue of available rate symbols, allowing you to filter by currency, category, or provider.

cURL Example:

curl "https://interestratesapi.com/api/v1/symbols?category=interbank&base=EUR&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"count": 3,
"symbols": [
{
"symbol": "EURIBOR_3M",
"name": "EURIBOR 3-Month",
"category": "interbank",
"country_code": "EU",
"currency_code": "EUR",
"frequency": "monthly",
"description": "The Euro Interbank Offered Rate for a 3-month period."
}
]
}

The response confirms that the EURIBOR_3M symbol is available, along with its description and other details.

2. Fetching the Latest EURIBOR 3-Month Rate

Once you have confirmed the availability of the EURIBOR_3M symbol, the next step is to fetch the latest rate.

Endpoint: /api/v1/latest

This endpoint retrieves the latest value for specified symbols.

cURL Example:

curl "https://interestratesapi.com/api/v1/latest?symbols=EURIBOR_3M&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"date": "2026-06-03",
"base": "EUR",
"rates": {
"EURIBOR_3M": 5.33
},
"dates": {
"EURIBOR_3M": "2026-06-03"
},
"currencies": {
"EURIBOR_3M": "EUR"
}
}

The response provides the latest EURIBOR 3-Month rate, which can be used in your application for various financial calculations.

3. Accessing Historical Data

To analyze trends or perform financial modeling, you may need historical data for the EURIBOR 3-Month rate.

Endpoint: /api/v1/historical

This endpoint allows you to retrieve the value of a symbol on a specific date.

cURL Example:

curl "https://interestratesapi.com/api/v1/historical?date=2025-06-15&symbols=EURIBOR_3M&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"date": "2025-06-15",
"base": "EUR",
"rates": {
"EURIBOR_3M": 5.30
},
"currencies": {
"EURIBOR_3M": "EUR"
}
}

This response provides the EURIBOR 3-Month rate for the specified date, allowing for historical analysis.

4. Retrieving Time Series Data

For a more comprehensive analysis, you may want to retrieve a time series of rates over a specified date range.

Endpoint: /api/v1/timeseries

This endpoint retrieves a series of values between two dates.

cURL Example:

curl "https://interestratesapi.com/api/v1/timeseries?start=2025-06-01&end=2026-06-01&symbols=EURIBOR_3M&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"base": "EUR",
"start_date": "2025-06-01",
"end_date": "2026-06-01",
"rates": {
"EURIBOR_3M": {
"2025-06-01": 5.20,
"2025-07-01": 5.25,
"2025-08-01": 5.30
}
},
"frequencies": {
"EURIBOR_3M": "monthly"
},
"currencies": {
"EURIBOR_3M": "EUR"
}
}

This response provides a time series of the EURIBOR 3-Month rate, which can be used for trend analysis and forecasting.

5. Analyzing Rate Fluctuations

Understanding how rates fluctuate over time can provide insights into market conditions.

Endpoint: /api/v1/fluctuation

This endpoint provides change statistics over a specified range.

cURL Example:

curl "https://interestratesapi.com/api/v1/fluctuation?start=2025-06-01&end=2026-06-01&symbols=EURIBOR_3M&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"rates": {
"EURIBOR_3M": {
"start_date": "2025-06-01",
"end_date": "2026-06-01",
"start_value": 5.20,
"end_value": 5.33,
"change": 0.13,
"change_pct": 2.50,
"high": 5.35,
"low": 5.15
}
}
}

This response provides valuable insights into the fluctuations of the EURIBOR 3-Month rate, including the percentage change and the highest and lowest values during the specified period.

6. Obtaining OHLC Data

For applications that require candlestick data, the OHLC (Open, High, Low, Close) data can be essential.

Endpoint: /api/v1/ohlc

This endpoint retrieves OHLC candlestick data for specified symbols.

cURL Example:

curl "https://interestratesapi.com/api/v1/ohlc?symbols=EURIBOR_3M&period=monthly&start=2025-06-01&end=2026-06-01&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"period": "monthly",
"start_date": "2025-06-01",
"end_date": "2026-06-01",
"rates": {
"EURIBOR_3M": [
{
"period": "2025-06",
"open": 5.20,
"high": 5.25,
"low": 5.15,
"close": 5.23,
"data_points": 30
},
{
"period": "2025-07",
"open": 5.23,
"high": 5.30,
"low": 5.20,
"close": 5.28,
"data_points": 31
}
]
}
}

This response provides the OHLC data for the EURIBOR 3-Month rate, which can be used for technical analysis in trading applications.

7. Comparing Loan Interest Costs

For applications that deal with loans, comparing interest costs between different rates can be crucial.

Endpoint: /api/v1/convert

This endpoint allows you to compare the total interest cost of a loan at the latest rate of each symbol.

cURL Example:

curl "https://interestratesapi.com/api/v1/convert?from=EURIBOR_3M&to=ECB_MRO&amount=100000&term_months=12&api_key=YOUR_KEY"

JSON Response Example:

{
"success": true,
"amount": 100000,
"term_months": 12,
"from": {
"symbol": "EURIBOR_3M",
"rate": 5.33,
"date": "2026-06-03",
"total_interest": 5330.00,
"total_payment": 105330.00
},
"to": {
"symbol": "ECB_MRO",
"rate": 4.50,
"date": "2026-06-03",
"total_interest": 4500.00,
"total_payment": 104500.00
},
"difference": {
"rate_spread": 0.83,
"interest_saved": 830.00
}
}

This response provides a detailed comparison of the total interest costs between the EURIBOR 3-Month rate and another rate, allowing users to make informed financial decisions.

Error Handling and Rate Limits

When integrating with the Interest Rates API, it's essential to handle errors gracefully. Common error responses include:

• 401: Missing or invalid api_key.
• 403: Account without active plan.
• 404: No symbols matched or no data for requested date/range.
• 422: Validation error (e.g., wrong date format, invalid symbol).
• 429: Request quota exhausted.

Additionally, the API provides rate limit headers:

• X-RateLimit-Limit: The maximum number of requests allowed in a given time period.
• X-RateLimit-Remaining: The number of requests remaining in the current time period.
• X-RateLimit-Reset: The time when the rate limit will reset.

Mini Project: Node.js/Express Endpoint

To demonstrate the integration of EURIBOR 3-Month data, let's create a simple Node.js/Express endpoint that fetches and serves the latest EURIBOR 3-Month rate.

Setup

First, ensure you have Node.js and Express installed. Create a new project and install the necessary packages:

npm init -y
npm install express axios

Code Example:

const express = require('express');
const axios = require('axios');
const app = express();
const PORT = process.env.PORT || 3000;

app.get('/euribor', async (req, res) => {
try {
const response = await axios.get('https://interestratesapi.com/api/v1/latest?symbols=EURIBOR_3M&api_key=YOUR_KEY');
res.json(response.data);
} catch (error) {
res.status(500).json({ error: 'Failed to fetch data' });
}
});

app.listen(PORT, () => {
console.log(`Server is running on port ${PORT}`);
});

This simple Express server fetches the latest EURIBOR 3-Month rate and serves it at the /euribor endpoint.

Conclusion

Integrating EURIBOR 3-Month data into your application using the Interest Rates API from interestratesapi.com is a straightforward process that can significantly enhance your application's financial capabilities. By leveraging the various endpoints provided by the API, you can access real-time and historical data, analyze fluctuations, and compare interest costs effectively. Start integrating today and provide your users with the financial insights they need!