Connecting the Dots: Energy API for Seamless Integration of DER (Distributed Energy Resources)

Introduction

In the rapidly evolving energy landscape, the integration of Distributed Energy Resources (DER) is becoming increasingly critical. Developers, data engineers, and energy traders face the daunting challenge of accessing reliable market data from a myriad of sources, each with its own unique formats and schedules. This fragmentation not only complicates data retrieval but also hinders the ability to make informed decisions in a timely manner. The need for a unified solution that aggregates and normalizes energy market data has never been more pressing.

Enter Energy API, a powerful REST API designed to streamline access to wholesale energy market data. By aggregating data from trusted sources such as OMIE, ENTSO-E, ESIOS, EIA/FRED, and Ember, Energy API provides a single, unified JSON interface that simplifies the complexities of energy data integration. This blog post will explore how Energy API can help developers seamlessly connect the dots in the energy market, enabling them to focus on building innovative solutions rather than wrestling with incompatible data formats.

Why Energy API

Energy API stands out in the crowded field of energy data solutions for several compelling reasons:

• Unified Data Access: With Energy API, developers can access data from multiple sources through a single REST interface. This eliminates the need to scrape government portals or stitch together disparate data formats, saving valuable development time and resources.
• 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 allows developers to retrieve a wide range of market data in one go.
• Consistent JSON Schema: Every commodity is delivered in the same JSON schema, which means developers can ship features in hours, not weeks. This consistency reduces the learning curve and accelerates the development process.
• Real-Time and Historical Data: Energy API provides access to both real-time and historical data, enabling developers to build applications that require up-to-date information as well as trend analysis over time.

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 offers a variety of endpoints that cater to different data needs. Here are some of the core endpoints relevant to developers:

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"

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 each requested symbol, along with their respective currencies.

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"

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 the historical prices for the specified date, allowing for trend analysis and reporting.

3. GET /timeseries

This endpoint retrieves historical series between two dates, which is 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"

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 for the specified symbols, allowing developers to visualize trends over time.

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"

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 can be crucial for trading strategies and risk management.

Real-World Use Cases

Energy API empowers developers to build a variety of applications that leverage energy market data. Here are three concrete examples:

• Price Alert System: Developers can create a price alert system that notifies users when energy prices reach a certain threshold. By utilizing the /latest endpoint, the application can continuously monitor prices and send alerts via email or SMS when specified conditions are met.
• ESG Dashboard: Companies focused on sustainability can build an ESG dashboard that visualizes carbon intensity data. By using the /carbon-intensity endpoint, developers can display real-time carbon emissions data, helping organizations track their environmental impact.
• Cost Calculator: A cost calculator can be developed to estimate monthly electricity costs based on usage. By leveraging the /cost-estimate endpoint, users can input their expected kWh usage and receive an estimate of their monthly electricity expenses.

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 provides access to historical energy prices, allowing developers to retrieve data for specific past dates. The /historical and /timeseries endpoints can be used to access this data.

Does the API support multiple currencies?

Absolutely! Energy API supports multiple currencies across different commodities. Developers can specify the base currency in their requests to receive prices in their desired currency.

Conclusion

In a world where energy data is crucial for decision-making, Energy API offers a seamless solution for developers looking to integrate reliable market data into their applications. By providing a unified REST interface that aggregates data from trusted sources, Energy API eliminates the complexities associated with traditional data retrieval methods.

Whether you're building a price alert system, an ESG dashboard, or a cost calculator, Energy API equips you with the tools you need to succeed. With comprehensive coverage, consistent data formats, and real-time access, you can focus on innovation rather than data integration challenges. Don't miss out on the opportunity to enhance your applications with powerful energy market data. Try Energy API for free today and experience the difference!