Revolutionizing Demand Response Programs: How Energy API Facilitates Consumer Engagement and Flexibility

Introduction

In today's rapidly evolving energy landscape, the need for real-time, reliable market data has never been more critical. Energy traders, utilities, and sustainability teams face the daunting challenge of navigating a complex web of disparate data sources, each with its own formats, schedules, and naming conventions. This fragmentation not only complicates data retrieval but also hinders timely decision-making, ultimately impacting profitability and sustainability efforts.

Enter Energy API, a powerful REST API designed to aggregate and normalize wholesale energy market data from trusted sources like OMIE, ENTSO-E, EIA, and more. By providing a unified JSON interface, Energy API simplifies the process of accessing crucial market data, enabling developers and data engineers to focus on building innovative solutions rather than wrestling with incompatible formats and scraping government portals.

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 endpoint. This eliminates the need for extensive ETL (Extract, Transform, Load) processes, allowing teams to ship features in hours instead of weeks.
• Comprehensive Coverage: The API supports over 39 symbols across six commodity categories, including electricity, natural gas, crude oil, coal, carbon allowances, and carbon intensity. This breadth of data empowers developers to create holistic energy solutions.
• Consistent JSON Schema: Every commodity is delivered in the same JSON format, simplifying integration and reducing the learning curve for developers. This consistency ensures that teams can quickly adapt to changes and focus on building value-added features.
• Real-Time Data: Energy API provides intraday electricity curves and spot prices, enabling developers to build applications that require up-to-the-minute data for accurate decision-making.

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 key fields include:

• success: Indicates whether the API call was successful.
• date: The date of the data retrieved.
• base: The base currency for the rates provided.
• rates: An object containing the latest prices for the requested symbols.
• currencies: The currency in which each symbol's price is quoted.

Core Endpoints

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

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"

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 response includes the latest prices for the specified symbols, along with their respective currencies and the date of the data.

2. GET /historical

This endpoint provides 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"
}
}

Field Explanation: This response provides historical prices for the specified symbols, allowing for trend analysis and historical comparisons.

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"
}
}

Field Explanation: The response includes daily prices for the specified symbols over the requested date range, making it easy to visualize trends and fluctuations.

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
}
}
}

Field Explanation: This response provides insights into price changes over the specified period, helping traders assess market volatility and make informed decisions.

Real-World Use Cases

Energy API's capabilities enable developers to build a variety of applications that address real-world challenges:

• Price Alert System: Developers can create a system that monitors energy prices and sends alerts when prices exceed or fall below specified thresholds. This can be achieved using the /latest endpoint to fetch real-time prices and trigger notifications based on user-defined criteria.
• ESG Dashboard: Sustainability teams can leverage the API to build dashboards that track carbon intensity and emissions data. By utilizing the /carbon-intensity and /emissions/latest endpoints, teams can visualize their carbon footprint and make data-driven decisions to improve sustainability efforts.
• Cost Calculator: Utilities can develop cost estimation tools that help consumers understand their energy expenses. By using the /cost-estimate endpoint, developers can provide users with monthly cost estimates based on their energy consumption and the latest market 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 symbols. The /historical and /timeseries endpoints enable you to retrieve data for specific past dates or over a range of dates, respectively.

Does the API support multiple currencies?

Absolutely! Energy API supports multiple currencies for different commodities. When making requests, you can specify the base currency, and the API will return prices in the requested currency.

Conclusion

In a world where energy data is crucial for informed decision-making, Energy API provides a robust solution that simplifies access to reliable market data. By unifying disparate data sources into a single, easy-to-use API, developers can focus on building innovative applications that drive efficiency and sustainability in the energy sector.

Whether you're a developer looking to create a price alert system, a sustainability team building an ESG dashboard, or a utility aiming to enhance customer engagement, Energy API is your fastest path from zero to production energy data. Try Energy API for free today and unlock the potential of real-time energy market insights.