Building Custom SaaS Solutions: A Developer's Guide to Integrating Energy API for Energy Management

Introduction

In today's fast-paced energy market, developers and data engineers face significant challenges when it comes to accessing reliable and timely energy market data. Traditional methods often involve scraping government portals or stitching together incompatible formats, which can be time-consuming and error-prone. This is where Energy API comes into play, offering a unified REST API that aggregates wholesale energy market data from trusted sources. With Energy API, developers can access a wealth of information on electricity, natural gas, crude oil, coal, carbon allowances, and grid carbon intensity, all in a consistent JSON format.

This blog post serves as a comprehensive guide for developers looking to integrate the Energy API into their applications for effective energy management. We will explore the key features of the API, provide practical examples, and demonstrate how to leverage its capabilities to build robust energy management solutions.

Why Energy API

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

• Unified Data Access: Instead of dealing with multiple sources like OMIE, ENTSO-E, and EIA, Energy API provides a single normalized REST surface. This means developers can access diverse data types without worrying about different formats or naming conventions, significantly reducing the time spent on data integration.
• Comprehensive Coverage: With over 39 symbols across six commodity categories, Energy API covers a wide range of energy data. This allows developers to query multiple commodities in a single API call, streamlining the data retrieval process and enhancing application performance.
• Rapid Development: The consistent JSON schema across all commodities means that developers can ship features in hours rather than weeks. This accelerates the development cycle and allows teams to respond quickly to market changes.
• Trusted Data Providers: Energy API aggregates data from reputable sources such as OMIE, ENTSO-E, and EIA, ensuring that the information is reliable and up-to-date. This trustworthiness is crucial for applications that rely on accurate market data.

Quick Start

To get started with Energy API, you will need to familiarize yourself with the base URL and the authentication method. The base URL for the API is:

https://energy-api.com/api/v1

Authentication is done via the api_key query parameter. Here’s how you can make your first request to retrieve the latest prices for a few energy commodities:

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"

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,
"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 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 to cater to different data needs. Below are some of the core endpoints relevant to energy management:

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"
}
}

The rates object provides the latest prices for the specified commodities, while the currencies object indicates the currency for each rate.

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"
}
}

The rates object 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"
}
}

The rates object contains historical prices keyed by date, making it easy to visualize trends over time.

4. GET /fluctuation

This 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=2025-01-31" \
--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
}
}
}

The fluctuation object provides insights into price changes over the specified period, which is valuable for traders and analysts.

Real-World Use Cases

Energy API can be leveraged in various applications to enhance energy management and trading strategies. 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 specified conditions are met.
• ESG Dashboard: Companies focused on sustainability can create an ESG dashboard that visualizes carbon intensity data. By utilizing the /carbon-intensity endpoint, developers can display real-time carbon intensity metrics, helping organizations track their environmental impact.
• Cost Calculator: A cost calculator can be developed to estimate monthly energy expenses based on current market prices. By using the /cost-estimate endpoint, users can input their expected energy consumption and receive an estimate of their monthly costs, aiding in budgeting and financial planning.

FAQ

How often does the TTF gas price update?

The TTF gas price updates daily, reflecting the most recent market data available from the EEX. This ensures that users have access to the latest pricing information for their trading and analysis needs.

Can I get historical energy prices going back 5 years?

Yes, Energy API allows you to retrieve historical prices for various commodities. You can specify a date range for your queries, enabling you to access data from the past five years or more, depending on the availability of the data.

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, making it easier for developers to work with international data.

Conclusion

Integrating Energy API into your applications can significantly enhance your ability to manage and analyze energy market data. By providing a unified and reliable source of information, 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, the API offers the flexibility and functionality needed to create powerful energy management solutions.

Don't let the challenges of accessing energy data hold you back. Start leveraging the capabilities of Energy API today and streamline your development process. Try Energy API for free and unlock the potential of real-time energy market data for your applications.