Energy API for Virtual Power Plants: Optimizing Distributed Energy Resources with Real-Time Data

Introduction

In today's rapidly evolving energy landscape, the integration of distributed energy resources (DERs) is becoming increasingly vital. Virtual Power Plants (VPPs) are at the forefront of this transformation, enabling the aggregation of various energy sources to optimize energy production and consumption. However, developers and energy professionals face significant challenges in accessing reliable and timely market data necessary for effective decision-making. Traditional methods often involve scraping government portals or stitching together incompatible data formats, which can be time-consuming and error-prone.

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 accessing critical information. With a single, normalized JSON interface, developers can focus on building innovative solutions without the hassle of managing disparate data sources. In this blog post, we will explore how Energy API can optimize VPPs and enhance the management of distributed energy resources using real-time data.

Why Energy API

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

• Unified Data Access: Energy API consolidates data from multiple sources such as OMIE, ENTSO-E, EIA, and ESIOS into a single, normalized REST surface. This eliminates the need for developers to navigate different formats, schedules, and naming conventions, significantly reducing the time spent on data integration.
• Comprehensive Coverage: With over 39 symbols across six commodity categories—electricity, gas, oil, coal, carbon, and carbon intensity—Energy API provides extensive market data. Developers can query multiple commodities in a single API call, streamlining their data retrieval processes.
• Rapid Development: The API features 16 endpoints that cover a wide range of functionalities, including spot prices, historical series, intraday curves, and cost estimates. This allows developers to ship features in hours rather than weeks, accelerating the time to market for their applications.
• Trusted Data Providers: Energy API sources its data from reputable organizations, ensuring that users receive accurate and reliable information. 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 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 commodities.

Core Endpoints

Energy API offers a variety of endpoints that cater to different data needs. Below are four key endpoints relevant to optimizing VPPs:

1. GET /latest

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

Key Parameters:

• symbols (required): A comma-separated list of symbols to retrieve prices for.
• base (optional): A currency filter for the response.

cURL Example:

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"
}
}

The rates object provides the latest prices for each requested symbol, allowing developers to make informed decisions based on current market conditions.

2. GET /historical

This endpoint retrieves 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 Parameters:

• date (required): The date in YYYY-MM-DD format.
• symbols (required): A comma-separated list of symbols to retrieve prices for.
• base (optional): A currency filter for the response.

cURL Example:

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 historical prices, which are essential for trend analysis and forecasting.

3. GET /timeseries

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

Key Parameters:

• start (required): The start date in YYYY-MM-DD format.
• end (required): The end date in YYYY-MM-DD format.
• symbols (required): A comma-separated list of symbols to retrieve prices for.
• base (optional): A currency filter for the response.

cURL Example:

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, allowing developers to visualize trends over time.

4. GET /fluctuation

This endpoint calculates the start and end values, absolute change, and percentage change over a specified period.

Key Parameters:

• start (required): The start date in YYYY-MM-DD format.
• end (required): The end date in YYYY-MM-DD format.
• symbols (required): A comma-separated list of symbols to retrieve fluctuation data for.
• base (optional): A currency filter for the response.

cURL Example:

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,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

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 response provides insights into price fluctuations, which are crucial for trading strategies and risk management.

Real-World Use Cases

Energy API can empower developers to build a variety of applications that enhance the management of distributed energy resources. 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 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 real-time insights into the environmental impact of energy consumption.
• Cost Calculator: A cost calculator can help users estimate their monthly energy expenses based on current market prices. By using the /cost-estimate endpoint, developers can create a user-friendly interface that allows users to input their energy consumption 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. This ensures that users have access to the latest pricing information for informed decision-making.

Can I get historical energy prices going back 5 years?

Yes, Energy API allows you to retrieve historical prices for various symbols. You can access data for specific past dates or use the /timeseries endpoint to obtain historical series over a specified period.

Does the API support multiple currencies?

Absolutely! Energy API supports multiple currencies, allowing you to filter responses based on your preferred currency. This flexibility is essential for developers working in different regions or with international clients.

Conclusion

In conclusion, Energy API is a powerful tool for developers and energy professionals looking to optimize the management of distributed energy resources. By providing a unified interface for accessing reliable market data, Energy API eliminates the complexities associated with traditional data retrieval methods. With its comprehensive coverage, rapid development capabilities, and trusted data sources, Energy API is the fastest path from zero to production energy data.

Whether you are building a price alert system, an ESG dashboard, or a cost calculator, Energy API offers the necessary endpoints and data to support your projects. Don't let the challenges of data integration hold you back—try Energy API for free today and unlock the potential of real-time energy data for your applications.