Transforming Energy Demand Forecasting: Leveraging Historical Data with Energy API

In the rapidly evolving energy sector, accurate demand forecasting is crucial for optimizing operations, managing resources, and ensuring sustainability. Traditional methods often rely on outdated data or cumbersome processes that can lead to inefficiencies and missed opportunities. Developers and data engineers face significant challenges when trying to aggregate and analyze energy market data from disparate sources, each with its own format and update schedule. This is where Energy API comes into play, offering a unified solution that simplifies access to comprehensive energy market data.

By leveraging historical data through a single REST API, developers can streamline their workflows, reduce the time spent on data integration, and focus on building innovative applications that drive value. This blog post will explore how Energy API can transform energy demand forecasting by providing reliable, normalized data from trusted sources.

Why Energy API?

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

Unified Data Access: Instead of navigating multiple platforms like OMIE, ENTSO-E, and EIA, developers can access all necessary data through a single API endpoint. This eliminates the need for extensive ETL processes, allowing teams to ship features in hours rather than weeks.
Comprehensive Coverage: With over 39 symbols across six commodity categories—electricity, gas, oil, coal, carbon, and carbon intensity—Energy API provides a holistic view of the energy market. This breadth of data enables developers to create more informed and accurate forecasting models.
Consistent JSON Schema: Every endpoint returns data in a consistent JSON format, making it easier for developers to integrate and manipulate the data without worrying about varying structures. This uniformity accelerates development and reduces errors.
Real-Time and Historical Data: Energy API offers both real-time and historical data, allowing developers to analyze trends and make predictions based on past performance. This capability is essential for building robust forecasting models.

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:

success: Indicates whether the request was successful.
date: The date of the data retrieved.
base: The base currency for the rates provided.
rates: Contains the latest prices for the requested symbols.
dates: The specific dates for each symbol's price.
currencies: The currency in which each symbol's price is quoted.

Core Endpoints

Energy API offers a variety of endpoints that cater to different data needs. Here are four key endpoints relevant to energy demand forecasting:

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"
}
}

This response provides the latest prices for Brent Crude, TTF Gas, and EUA CO2, allowing developers to quickly assess 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 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 allows developers to analyze historical price data, which is essential for identifying trends and making informed forecasts.

3. GET /timeseries

This endpoint provides 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"

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 daily prices for Brent Crude and TTF Gas over the specified date range, enabling developers to visualize trends and fluctuations.

4. GET /fluctuation

This endpoint calculates the 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=2025-01-31" \
--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 valuable insights into price movements, helping developers assess market volatility and make informed trading decisions.

Real-World Use Cases

Energy API can be utilized in various applications to enhance decision-making and operational efficiency. Here are three concrete examples:

Price Alert System: Developers can build a price alert system that notifies users when energy prices reach a certain threshold. By using the /latest endpoint, the application can continuously monitor prices and send alerts via email or SMS when conditions are met.
ESG Dashboard: Companies focused on sustainability can create dashboards that track carbon intensity and emissions data. By leveraging the /carbon-intensity and /emissions/latest endpoints, developers can provide real-time insights into a company's carbon footprint and compliance with ESG standards.
Cost Calculator: A cost calculator can help businesses estimate their monthly energy expenses based on current market prices. By utilizing the /cost-estimate endpoint, developers can create a tool that factors in the latest prices and user-defined consumption levels to provide accurate cost projections.

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 historical data for various symbols. Developers can use the /historical and /timeseries endpoints to access historical prices, allowing for in-depth analysis and forecasting.

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 preferred currency.

Conclusion

In an era where data-driven decision-making is paramount, Energy API provides a powerful solution for developers looking to enhance their energy demand forecasting capabilities. By offering a unified interface to access reliable market data, Energy API eliminates the complexities associated with data integration and empowers teams to focus on building innovative applications.

Whether you are developing a price alert system, an ESG dashboard, or a cost calculator, Energy API equips you with the tools necessary to succeed in the competitive energy landscape. Don't let outdated methods hold you back—Try Energy API for free today and unlock the potential of your energy data.