Energy API and the Circular Economy: How Developers Can Drive Sustainable Practices

Introduction

In today's rapidly evolving energy landscape, developers face the challenge of accessing reliable and consistent market data across various commodities. The energy sector is characterized by a multitude of data sources, each with its own formats, schedules, and naming conventions. This fragmentation makes it difficult for developers, data engineers, and energy traders to obtain the information they need efficiently. Without a unified solution, teams often resort to scraping government portals or stitching together incompatible data formats, leading to wasted time and increased complexity.

This is where Energy API comes into play. By aggregating wholesale energy market data from trusted sources such as OMIE, ENTSO-E, EIA, and more, Energy API provides a single, normalized REST interface that simplifies access to critical energy data. In this blog post, we will explore how developers can leverage Energy API to drive sustainable practices within the circular economy, streamline their workflows, and ultimately contribute to a more sustainable future.

Why Energy API

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

• Unified Data Access: With Energy API, developers can access data from multiple sources through a single endpoint. This eliminates the need to manage different formats and schedules, allowing teams to focus on building applications rather than data integration.
• Comprehensive Coverage: Energy API offers over 39 symbols across six commodity categories, including electricity, natural gas, crude oil, coal, carbon allowances, and grid carbon intensity. This extensive coverage ensures that developers have access to the data they need for a wide range of applications.
• Rapid Development: The consistent JSON schema across all commodities means that developers can ship features in hours instead of weeks. This accelerates the development process and allows teams to respond quickly to market changes.
• Trusted Data Providers: Energy API aggregates data from reputable sources, ensuring that the information is accurate and reliable. This trustworthiness is crucial for developers building applications that rely on real-time market data.

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

Core Endpoints

Energy API provides a variety of endpoints that cater to different data needs. Here are four core endpoints relevant to developers:

1. GET /latest

This endpoint retrieves the most recent prices 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"
}
}

The rates object provides the latest prices for each symbol requested, making it easy for developers to display current market conditions.

2. GET /historical

This endpoint allows users 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"

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"
}
}

This endpoint is particularly useful for historical analysis and reporting, allowing developers to track price trends over time.

3. GET /timeseries

The timeseries endpoint provides 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"

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"
}
}

This endpoint is invaluable for developers looking to visualize data trends and perform in-depth analysis over specified periods.

4. GET /fluctuation

The fluctuation endpoint provides start and 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=2025-03-31" \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

Example JSON response:

{
"success": true,
"fluctuations": {
"BRENT_CRUDE": {
"start_value": 76.30,
"end_value": 75.90,
"change": -0.40,
"change_pct": -0.52
},
"TTF_GAS": {
"start_value": 46.80,
"end_value": 47.10,
"change": 0.30,
"change_pct": 0.64
}
}
}

This endpoint is particularly useful for traders and analysts who need to assess market volatility and make informed decisions based on price movements.

Real-World Use Cases

Developers can build a variety of applications using Energy API. Here are three concrete examples:

• Price Alert System: Developers can create a price alert system that notifies users when the price of a commodity reaches a certain threshold. By utilizing the /latest endpoint, the application can continuously monitor prices and send alerts via email or SMS when conditions are met.
• ESG Dashboard: An ESG (Environmental, Social, and Governance) dashboard can be built to visualize carbon intensity and emissions data. By leveraging the /carbon-intensity and /emissions/latest endpoints, developers can provide insights into the environmental impact of energy consumption.
• Cost Calculator: A cost calculator can help businesses estimate their monthly energy expenses based on current market prices. By using the /cost-estimate endpoint, developers can create a tool that allows users to input their expected energy usage and receive an estimated cost based on the latest prices.

FAQ

How often does the TTF gas price update?

The TTF gas price updates daily, reflecting the most recent market conditions. Developers can use the /latest endpoint to retrieve the most current price at any time.

Can I get historical energy prices going back 5 years?

Yes, Energy API allows you to access historical prices for various commodities. By using the /historical and /timeseries endpoints, developers can retrieve data for specific dates or ranges, enabling comprehensive historical analysis.

Does the API support multiple currencies?

Yes, Energy API supports multiple currencies. When making requests, developers can specify the base parameter to filter results by currency, ensuring that they receive data in the desired format.

Conclusion

In conclusion, Energy API is a powerful tool for developers looking to access reliable energy market data without the hassle of managing multiple sources. By providing a unified REST interface, Energy API streamlines the process of obtaining critical information across various commodities, enabling developers to focus on building innovative applications that drive sustainable practices.

Whether you're building a price alert system, an ESG dashboard, or a cost calculator, Energy API offers the flexibility and reliability needed to succeed in today's energy landscape. Don't let fragmented data sources hold you back—try Energy API for free today and unlock the potential of energy data for your projects.