Empowering Microgrids with Energy API: A Framework for Resilient Local Energy Solutions

Introduction

In today's rapidly evolving energy landscape, the need for reliable and accessible market data has never been more critical. Energy traders, utilities, and sustainability teams face the daunting challenge of navigating a fragmented ecosystem of data sources, each with its own formats, schedules, and naming conventions. This complexity not only hampers decision-making but also increases operational costs and time spent on data management. The solution lies in a unified approach to energy data aggregation, which is where Energy API comes into play.

Energy API provides a comprehensive REST API that aggregates wholesale energy market data from trusted sources such as OMIE, ENTSO-E, EIA, and more. By normalizing this data into a single JSON interface, developers can access a wealth of information without the hassle of scraping government portals or stitching together incompatible formats. This blog post will explore how Energy API empowers microgrids and local energy solutions, providing developers with the tools they need to build resilient energy systems.

Why Energy API

Energy API stands out in the crowded field of energy data solutions for several reasons:

• Unified Data Access: With Energy API, developers can access over 39 symbols across six commodity categories—electricity, gas, oil, coal, carbon, and carbon intensity—through a single, normalized REST interface. This eliminates the need to manage multiple data sources, reducing development time and complexity.
• Comprehensive Endpoints: Energy API offers 16 endpoints that cover a wide range of functionalities, including spot prices, historical series, intraday curves, and cost estimates. This breadth of coverage allows developers to build sophisticated applications without the need for extensive ETL (Extract, Transform, Load) processes.
• Consistent JSON Schema: Every commodity is delivered in the same JSON schema, enabling developers to ship features in hours rather than weeks. This consistency simplifies integration and accelerates time-to-market for new applications.
• Trusted Data Providers: Energy API aggregates data from reputable sources, ensuring that users receive accurate and timely information. This trustworthiness is crucial for developers who rely on data for critical decision-making processes.

Quick Start

Getting started with Energy API is straightforward. The base URL for the API is:

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

To make your first request, you will need to include the 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 symbols.

Core Endpoints

1. GET /latest

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

Key Params: symbols (required), base (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 each symbol requested, while the dates object indicates when the prices were last updated.

2. GET /historical

This endpoint allows users 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"
}
}

This response provides historical prices for the specified date, allowing developers to analyze trends over time.

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"
}
}

This response provides a time series of prices for the specified symbols, allowing developers to visualize trends and fluctuations over the selected period.

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
}
}
}

This response provides insights into price fluctuations, which can be crucial for traders looking to make informed decisions based on market volatility.

Real-World Use Cases

1. Price Alert System

Developers can build 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

Energy API can power an ESG (Environmental, Social, and Governance) dashboard that tracks 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 sustainability efforts.

3. Cost Calculator

A cost calculator can be developed to estimate monthly energy expenses based on current market prices. Using the /cost-estimate endpoint, developers can input the latest price and expected consumption to provide users with accurate cost projections.

FAQ

How often does the TTF gas price update?

The TTF gas price updates daily, reflecting the most recent market conditions. Users can access the latest price through the /latest endpoint.

Can I get historical energy prices going back 5 years?

Yes, Energy API provides historical data for various symbols, allowing users to access prices from the past. The /historical and /timeseries endpoints can be used to retrieve this data.

Does the API support multiple currencies?

Yes, Energy API supports multiple currencies. Users can specify the base currency in their requests, and the API will return prices in the requested currency format.

Conclusion

In conclusion, Energy API is a powerful tool that empowers developers to build resilient local energy solutions by providing reliable and accessible market data. By aggregating data from trusted sources and normalizing it into a unified JSON interface, Energy API eliminates the complexities associated with traditional data management. Whether you're building a price alert system, an ESG dashboard, or a cost calculator, Energy API offers the flexibility and functionality needed to succeed in today's energy landscape.

Don't let fragmented data sources hold you back. Try Energy API for free today and unlock the potential of your energy applications!