Building a Carbon Footprint Reduction Tool: A Developer's Guide with Energy API

Introduction

In today's world, the urgency to address climate change and reduce carbon footprints has never been more pressing. As developers and data engineers, we are often tasked with creating solutions that not only meet business needs but also contribute to sustainability efforts. However, accessing reliable energy market data can be a daunting challenge. Traditional methods often involve scraping government portals or stitching together disparate data sources, which can be time-consuming and error-prone.

This blog post aims to guide you through building a Carbon Footprint Reduction Tool using the Energy API. This powerful REST API aggregates wholesale energy market data from trusted sources, providing a unified JSON interface that simplifies the process of obtaining critical energy data. By leveraging the Energy API, you can focus on developing impactful applications without the hassle of managing multiple data formats and sources.

Why Energy API

The Energy API stands out in the crowded landscape of energy data providers for several reasons:

• Unified Data Access: Instead of dealing with multiple APIs, each with its own format and schedule, the Energy API offers a single normalized REST surface. This means you can access data from sources like OMIE, ENTSO-E, and EIA without worrying about compatibility issues.
• Comprehensive Coverage: With over 39 symbols across six commodity categories—electricity, gas, oil, coal, carbon, and carbon intensity—you can retrieve a wide array of data points relevant to your projects. This comprehensive coverage allows developers to build more robust applications without the need for extensive data aggregation.
• Rapid Development: The Energy API's consistent JSON schema across all commodities enables developers to ship features in hours rather than weeks. This efficiency is crucial for teams looking to iterate quickly and respond to market changes.
• Trusted Data Providers: The API aggregates data from reputable sources, ensuring that the information you receive is accurate and reliable. This trustworthiness is essential for applications that rely on precise energy market data.

Quick Start

Getting started with the Energy API is straightforward. The base URL for accessing the API is:

https://energy-api.com/api/v1

To make your first request, you will need to include your API key as a query parameter. Here’s an example of how to retrieve the latest prices for Brent Crude and TTF Gas:

curl -G https://energy-api.com/api/v1/latest \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

The expected JSON response will look like this:

{
"success": true,
"date": "2026-06-11",
"base": "MIXED",
"rates": {
"BRENT_CRUDE": 74.82,
"TTF_GAS": 38.15
},
"dates": {
"BRENT_CRUDE": "2026-06-11",
"TTF_GAS": "2026-06-11"
},
"currencies": {
"BRENT_CRUDE": "USD",
"TTF_GAS": "EUR"
}
}

In this response, the success field indicates whether the request was successful, while the rates object contains the latest prices for the requested symbols.

Core Endpoints

1. GET /latest

This endpoint retrieves the most recent price for one or more symbols.

Key Params: symbols (required), base (optional)

curl -G https://energy-api.com/api/v1/latest \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS,EUA_CO2" \
--data-urlencode "api_key=YOUR_API_KEY"

Expected JSON response:

{
"success": true,
"date": "2026-06-11",
"base": "MIXED",
"rates": {
"BRENT_CRUDE": 74.82,
"TTF_GAS": 38.15,
"EUA_CO2": 67.40
},
"dates": {
"BRENT_CRUDE": "2026-06-11",
"TTF_GAS": "2026-06-11",
"EUA_CO2": "2026-06-11"
},
"currencies": {
"BRENT_CRUDE": "USD",
"TTF_GAS": "EUR",
"EUA_CO2": "EUR"
}
}

In this response, the rates object provides the latest prices for Brent Crude, TTF Gas, and EUA CO2, allowing developers to quickly access current market conditions.

2. GET /historical

This endpoint allows you to retrieve prices for all symbols on a specific past date. If the date falls on a non-publishing day, it returns the most recent value before it.

Key Params: date (YYYY-MM-DD, required), symbols (required), base (optional)

curl -G https://energy-api.com/api/v1/historical \
--data-urlencode "date=2025-09-15" \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

Expected JSON response:

{
"success": true,
"date": "2025-09-15",
"base": "MIXED",
"rates": {
"BRENT_CRUDE": 71.45,
"TTF_GAS": 36.20
},
"currencies": {
"BRENT_CRUDE": "USD",
"TTF_GAS": "EUR"
}
}

This response provides historical prices, which are essential for trend analysis and reporting.

3. GET /timeseries

This endpoint retrieves historical series between two dates, making it ideal for charting and trend analysis.

Key Params: start (required), end (required), symbols (required), base (optional)

curl -G https://energy-api.com/api/v1/timeseries \
--data-urlencode "start=2025-01-01" \
--data-urlencode "end=2025-03-31" \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

Expected JSON response:

{
"success": true,
"base": "MIXED",
"start_date": "2025-01-01",
"end_date": "2025-03-31",
"rates": {
"BRENT_CRUDE": {
"2025-01-02": 76.30,
"2025-01-03": 75.90
},
"TTF_GAS": {
"2025-01-02": 46.80,
"2025-01-03": 47.10
}
},
"frequencies": {
"BRENT_CRUDE": "daily",
"TTF_GAS": "daily"
},
"currencies": {
"BRENT_CRUDE": "USD",
"TTF_GAS": "EUR"
}
}

This response provides a time series of prices, which can be used for detailed analysis and visualization.

4. GET /fluctuation

This endpoint provides start/end values, absolute change, and percentage change over a specified period.

Key Params: start (required), end (required), symbols (required), base (optional)

curl -G https://energy-api.com/api/v1/fluctuation \
--data-urlencode "start=2025-01-01" \
--data-urlencode "end=2025-01-31" \
--data-urlencode "symbols=BRENT_CRUDE" \
--data-urlencode "api_key=YOUR_API_KEY"

Expected JSON response:

{
"success": true,
"fluctuation": {
"BRENT_CRUDE": {
"start_value": 76.30,
"end_value": 75.90,
"change": -0.40,
"change_pct": -0.52
}
}
}

This response provides insights into price fluctuations, which are crucial for traders and analysts monitoring market volatility.

Real-World Use Cases

1. Price Alert System

Developers can build a price alert system that notifies users when energy prices reach a certain threshold. By using the /latest endpoint, you can continuously monitor prices and trigger alerts based on user-defined criteria.

2. ESG Dashboard

For sustainability-focused organizations, an ESG dashboard can be created to visualize carbon intensity and emissions data. Utilizing the /carbon-intensity endpoint, developers can provide real-time insights into the carbon footprint of energy consumption.

3. Cost Calculator

A cost calculator can help businesses estimate their monthly energy expenses based on current market prices. By leveraging the /cost-estimate endpoint, developers can create a tool that calculates costs based on user input for energy consumption.

FAQ

How often does the TTF gas price update?

The TTF gas price updates daily, providing users with the most current market information. This frequency ensures that developers can rely on the API for timely data in their applications.

Can I get historical energy prices going back 5 years?

Yes, the Energy API allows you to access historical prices for various symbols, enabling developers to retrieve data for analysis over extended periods. This feature is particularly useful for trend analysis and reporting.

Does the API support multiple currencies?

Absolutely! The Energy API supports multiple currencies, allowing developers to specify a base currency for their requests. This flexibility is essential for applications that operate in different regions or require currency conversions.

Conclusion

Building a Carbon Footprint Reduction Tool is not only a technical challenge but also a significant opportunity to contribute to sustainability efforts. By leveraging the Energy API, developers can access reliable energy market data without the complexities of traditional data aggregation methods. The API's unified interface, comprehensive coverage, and trusted data sources empower you to create impactful applications that drive change.

Now is the time to take action. Start building your Carbon Footprint Reduction Tool today by exploring the capabilities of the Energy API. With a 7-day free trial, you can experience the benefits firsthand and see how it can transform your approach to energy data.

Try Energy API for free and unlock the potential of energy market data for your projects!