Developing a Green Energy Portfolio: How Utilities Can Utilize Energy API for Renewable Investments

Introduction

As the world shifts towards sustainable energy solutions, utilities face the pressing challenge of developing a robust green energy portfolio. The transition to renewable energy sources is not just a regulatory requirement but also a strategic imperative for utilities aiming to remain competitive in a rapidly evolving market. However, accessing reliable and timely energy market data can be a daunting task, often requiring extensive resources to scrape government portals or stitch together disparate data formats.

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 obtaining critical information on electricity, natural gas, crude oil, coal, carbon allowances, and grid carbon intensity. In this blog post, we will explore how utilities can leverage Energy API to enhance their renewable investments and streamline their data acquisition processes.

Why Energy API

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

• One Unified Interface: Instead of dealing with multiple data sources like OMIE, ENTSO-E, and EIA, Energy API offers a single normalized REST surface. This means developers can access a wide range of data without worrying about different formats, schedules, or naming conventions.
• Comprehensive Data Coverage: With over 39 symbols across six commodity categories, Energy API provides extensive market data that includes spot prices, historical series, intraday curves, and more. This breadth of data allows developers to build sophisticated applications without the hassle of integrating multiple APIs.
• 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 focus on building value-added features instead of wrestling with data integration.
• Trusted Data Providers: Energy API aggregates data from reputable sources such as OMIE, ENTSO-E, EIA, FRED, and ESIOS. This ensures that the data you are using for decision-making is accurate and reliable.

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 rate is expressed.

Core Endpoints

Energy API offers a variety of endpoints that cater to different data needs. Below are some of the core endpoints relevant to developing a green energy portfolio:

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"

Expected 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 Brent Crude, TTF Gas, and EUA CO2, allowing developers to quickly assess market conditions.

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"

Expected 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 trends, which is crucial for making informed investment decisions.

3. GET /timeseries

This endpoint retrieves historical series between two dates, making it 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"

Expected 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, enabling 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 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=2025-03-31" \
--data-urlencode "symbols=BRENT_CRUDE,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

Expected 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 movements, which can be critical for trading strategies and risk management.

Real-World Use Cases

Here are three concrete examples of how developers can leverage Energy API to build impactful applications:

1. 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.

2. ESG Dashboard

Utilities can build an Environmental, Social, and Governance (ESG) dashboard that visualizes carbon intensity and emissions data. By using the /carbon-intensity and /emissions/latest endpoints, developers can provide real-time insights into the environmental impact of energy consumption.

3. Cost Calculator

A cost calculator can help businesses estimate their monthly energy expenses based on current market prices. By leveraging the /cost-estimate endpoint, developers can provide users with a simple interface to input their energy usage 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 provides historical data for various symbols, allowing users to access prices going back several years. This is particularly useful for trend analysis and forecasting.

Does the API support multiple currencies?

Yes, Energy API supports multiple currencies, allowing users to specify their preferred currency when making requests. This flexibility is essential for international operations and financial analysis.

Conclusion

In conclusion, developing a green energy portfolio is a complex but essential task for utilities in today's energy landscape. By leveraging the capabilities of Energy API, developers can access reliable and comprehensive market data without the headaches of traditional data acquisition methods. The unified REST API not only simplifies data access but also accelerates development cycles, enabling teams to focus on building innovative solutions.

Whether you are building a price alert system, an ESG dashboard, or a cost calculator, Energy API provides the tools you need to succeed. Don't let data challenges hold you back—Try Energy API for free today and unlock the potential of your green energy investments.