Designing Energy Efficiency Incentive Programs: A Data-Driven Approach with Energy API

Introduction

In today's rapidly evolving energy landscape, the need for accurate and timely data is more critical than ever. Energy traders, utilities, and sustainability teams face the challenge of navigating a complex web of energy market data, often scattered across various platforms and formats. This fragmentation not only complicates data retrieval but also hinders effective decision-making. Developers and data engineers are tasked with the daunting job of aggregating this data, which can be time-consuming and error-prone. This is where a unified solution like Energy API comes into play, offering a streamlined approach to accessing wholesale energy market data.

By leveraging a single REST API that aggregates data from trusted sources such as OMIE, ENTSO-E, and EIA, developers can eliminate the pain of scraping government portals or stitching together incompatible formats. This blog post will explore how to design energy efficiency incentive programs using a data-driven approach, facilitated by the powerful capabilities of the Energy API. We will delve into the API's features, provide practical examples, and demonstrate how to harness this data to drive impactful energy initiatives.

Why Energy API

The 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 a wide range of energy market data through a single, normalized REST interface. This eliminates the need to manage multiple data sources, each with its own formats and schedules, significantly reducing development time and complexity.
• Comprehensive Coverage: The API provides access to over 39 symbols across six commodity categories, including electricity, natural gas, crude oil, coal, carbon allowances, and grid carbon intensity. This extensive coverage allows developers to build robust applications that require diverse energy data.
• Rapid Development: The Energy API's 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: The API aggregates data from reputable sources such as OMIE, ENTSO-E, and EIA, ensuring that users have access to reliable and accurate information. This trust in data quality is crucial for making informed decisions in the energy sector.

Quick Start

Getting started with the 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 use the appropriate endpoint along with your API key. Here’s an example of how to retrieve the latest prices for multiple 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 key fields include:

• success: Indicates whether the request was successful.
• date: The date for which the data is relevant.
• rates: Contains the latest prices for the requested symbols.
• currencies: Specifies the currency for each symbol.

Core Endpoints

To effectively utilize the Energy API, developers should be familiar with several core endpoints that provide essential data for energy efficiency programs. Below are four key endpoints relevant to our discussion:

1. GET /latest

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

Key Parameters:

• symbols: Required. A comma-separated list of symbols to retrieve prices for.
• base: Optional. Currency filter for the returned prices.

cURL Example:

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:

• success: Indicates the success of the API call.
• rates: Contains the latest prices for the requested commodities.

2. GET /historical

This endpoint provides historical prices for all symbols on a specific past date.

Key Parameters:

• date: Required. The date in YYYY-MM-DD format.
• symbols: Required. A comma-separated list of symbols.
• base: Optional. Currency filter for the returned prices.

cURL Example:

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:

• date: The date for which the historical data is requested.
• rates: Contains the historical prices for the requested symbols.

3. GET /timeseries

This endpoint retrieves historical series between two dates, ideal for charting and trend analysis.

Key Parameters:

• start: Required. The start date in YYYY-MM-DD format.
• end: Required. The end date in YYYY-MM-DD format.
• symbols: Required. A comma-separated list of symbols.
• base: Optional. Currency filter for the returned prices.

cURL Example:

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:

• start_date: The start date for the time series data.
• end_date: The end date for the time series data.
• rates: Contains the historical prices keyed by date for each symbol.

4. GET /fluctuation

This endpoint provides start/end values, absolute change, and percentage change over a specified period.

Key Parameters:

• start: Required. The start date in YYYY-MM-DD format.
• end: Required. The end date in YYYY-MM-DD format.
• symbols: Required. A comma-separated list of symbols.
• base: Optional. Currency filter for the returned prices.

cURL Example:

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,TTF_GAS" \
--data-urlencode "api_key=YOUR_API_KEY"

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
}
}
}

Field Explanation:

• start_value: The price at the start of the period.
• end_value: The price at the end of the period.
• change: The absolute change in price over the period.
• change_pct: The percentage change in price over the period.

Real-World Use Cases

Developers can leverage the Energy API to build a variety of applications that enhance energy efficiency and decision-making. Here are three concrete examples:

1. Price Alert System

By utilizing the /latest endpoint, developers can create a price alert system that notifies users when energy prices reach a certain threshold. This can help traders make timely decisions based on market fluctuations.

2. ESG Dashboard

Using the /timeseries endpoint, developers can build an ESG (Environmental, Social, and Governance) dashboard that visualizes historical carbon intensity data. This allows organizations to track their carbon footprint and make informed sustainability decisions.

3. Cost Calculator

With the /cost-estimate endpoint, developers can create a simple monthly wholesale electricity cost calculator. Users can input their expected usage, and the application can provide an estimate 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, the Energy API allows you to retrieve historical prices for various symbols. You can specify the date range you are interested in, making it easy to analyze trends over time.

Does the API support multiple currencies?

Absolutely! The Energy API supports multiple currencies, allowing you to filter prices based on your preferred currency. This flexibility is essential for international users and traders.

Conclusion

In conclusion, the Energy API provides a powerful and efficient solution for accessing wholesale energy market data. By leveraging its unified REST interface, developers can save time and resources while building applications that drive energy efficiency and sustainability. The API's comprehensive coverage, rapid development capabilities, and trusted data sources make it an invaluable tool for anyone working in the energy sector.

Whether you're building a price alert system, an ESG dashboard, or a cost calculator, the Energy API offers the data and functionality you need to succeed. Don't let fragmented data hold you back—Try Energy API for free today and unlock the potential of energy data for your projects.