How Energy API Supports Carbon Footprint Calculators: Tools for Businesses and Sustainability Teams

Introduction

In today's world, businesses are increasingly focused on sustainability and reducing their carbon footprints. One of the most effective ways to achieve this is through the use of carbon footprint calculators. These tools help organizations measure their greenhouse gas emissions and identify areas for improvement. However, building an accurate and reliable carbon footprint calculator requires access to real-time energy market data, which can be a daunting task for developers and data engineers.

Many organizations struggle with the complexities of aggregating energy data from various sources, each with different formats, schedules, and naming conventions. This is where Energy API comes into play. By providing a unified REST API that aggregates wholesale energy market data from trusted sources, Energy API simplifies the process of obtaining the necessary data for carbon footprint calculations and other sustainability initiatives.

Why Energy API

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

• One Unified Interface: Instead of dealing with multiple data sources like OMIE, ENTSO-E, and EIA, developers can access all necessary data through a single, normalized REST API. This significantly reduces the time and effort required to integrate energy data into applications.
• Comprehensive Data Coverage: With over 39 symbols across six commodity categories—electricity, natural gas, crude oil, coal, carbon allowances, and grid carbon intensity—Energy API provides a wealth of information that can be leveraged for various applications, including carbon footprint calculators.
• Rapid Development: The consistent JSON schema across all commodities allows developers to ship features in hours rather than weeks. This means that teams can quickly iterate on their applications and respond to changing market conditions.
• Reliable Data Sources: Energy API aggregates data from trusted providers such as OMIE, ENTSO-E, EIA, and Ember, ensuring that users have access to accurate and up-to-date information.

Quick Start

Getting started with Energy API is straightforward. The base URL for 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 key fields include:

• success: Indicates whether the request was successful.
• date: The date of the data retrieved.
• base: The base currency for the rates.
• rates: An object containing the latest prices for the requested symbols.
• currencies: The currency in which each rate is expressed.

Core Endpoints

Energy API offers a variety of endpoints that are particularly useful for developers working on carbon footprint calculators and sustainability tools. Here are four key endpoints:

1. GET /latest

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

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

Example 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"
}
}

Field Explanation: The rates object provides the latest prices for Brent Crude, TTF Gas, and EUA CO2, which are essential for calculating carbon emissions based on energy consumption.

2. GET /historical

This endpoint provides prices for all symbols on a specific past date.

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"

Example 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"
}
}

Field Explanation: This response provides historical prices, which are crucial for analyzing trends in energy costs over time, helping businesses make informed decisions about energy usage and sustainability efforts.

3. GET /timeseries

This endpoint retrieves historical series between two dates, 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"

Example 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"
}
}

Field Explanation: The rates object contains historical prices keyed by date, allowing developers to visualize trends and fluctuations in energy prices over time, which is essential for accurate carbon footprint calculations.

4. GET /carbon-intensity

This endpoint provides grid carbon intensity in gCO2eq/kWh by country.

Key Params: country (ISO-2, required), base (optional)

curl -G https://energy-api.com/api/v1/carbon-intensity \
--data-urlencode "country=DE" \
--data-urlencode "api_key=YOUR_API_KEY"

Example JSON Response:

{
"success": true,
"country": "DE",
"carbon_intensity": {
"gCO2eq/kWh": 300
}
}

Field Explanation: The carbon_intensity field provides the carbon intensity of electricity generation in grams of CO2 equivalent per kilowatt-hour, which is critical for businesses aiming to assess the environmental impact of their energy consumption.

Real-World Use Cases

Energy API can be utilized in various real-world scenarios to enhance sustainability efforts:

• Price Alert System: Developers can create a system that alerts users when energy prices reach a certain threshold. By using the /latest endpoint, they can monitor real-time prices and send notifications based on user-defined criteria.
• ESG Dashboard: Sustainability teams can build dashboards that visualize energy consumption and carbon emissions over time. By leveraging the /timeseries and /carbon-intensity endpoints, they can provide insights into how energy usage impacts their overall carbon footprint.
• Cost Calculator: Businesses can develop cost calculators that estimate monthly energy expenses based on current prices. Using the /cost-estimate endpoint, they can provide users with accurate estimates based on their energy consumption patterns.

FAQ

How often does the TTF gas price update?

The TTF gas price updates daily, reflecting the most recent market conditions. This ensures that users have access to the latest pricing information for their calculations.

Can I get historical energy prices going back 5 years?

Yes, Energy API allows you to retrieve historical prices for various symbols. However, the specific range of historical data available may vary by endpoint, so it's essential to check the documentation for details.

Does the API support multiple currencies?

Yes, Energy API supports multiple currencies. You can specify the base currency for your requests, allowing you to receive prices in your preferred currency.

Conclusion

In conclusion, Energy API is an invaluable resource for businesses and developers looking to enhance their sustainability initiatives through accurate energy market data. By providing a unified interface to access a wide range of energy data, Energy API eliminates the complexities associated with data aggregation and normalization.

Whether you are building a carbon footprint calculator, an ESG dashboard, or a cost estimation tool, Energy API offers the features and capabilities you need to succeed. With trusted data sources and a consistent JSON schema, you can focus on building impactful applications without the hassle of managing multiple data feeds.

Ready to get started? Try Energy API for free and unlock the potential of energy data for your sustainability efforts today!