Developing Energy Efficiency Programs: Utilizing Energy API for Targeted Outreach

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. The traditional methods of scraping government portals or stitching together disparate data sources can be time-consuming, error-prone, and inefficient. As the demand for accurate energy data grows, so does the need for a streamlined solution that can provide comprehensive market insights without the hassle of managing multiple data formats and sources.

This is where Energy API comes into play. By aggregating wholesale energy market data from trusted sources such as OMIE, ENTSO-E, EIA, and others, Energy API offers a unified REST API that simplifies the process of accessing critical energy information. In this blog post, we will explore how to develop energy efficiency programs using Energy API, highlighting its key features, endpoints, and practical use cases that can empower developers and energy professionals alike.

Why Energy API

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

• Unified Data Format: Energy API normalizes data from various sources into a single JSON interface. This eliminates the need for developers to handle different formats, schedules, and naming conventions, allowing them to focus on building applications rather than managing data inconsistencies.
• Comprehensive Coverage: With over 39 symbols across six commodity categories—electricity, natural gas, crude oil, coal, carbon allowances, and carbon intensity—Energy API provides a holistic view of the energy market. Developers can query multiple commodities in a single API call, saving time and reducing complexity.
• Rich Endpoints: Energy API offers 16 endpoints that cover a wide range of functionalities, including spot prices, historical series, intraday curves, and cost estimates. This extensive feature set allows developers to build sophisticated applications with minimal effort.
• Rapid Development: The consistent JSON schema across all commodities means that developers can ship features in hours, not weeks. This accelerates the development cycle and enables teams to respond quickly to market changes.

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 request was successful.
• date: The date of the data retrieved.
• base: The base currency for the rates.
• rates: An object containing the latest prices for the requested symbols.
• currencies: The currency in which each rate is quoted.

Core Endpoints

Energy API provides a variety of endpoints that cater to different data needs. Here are four core endpoints relevant to energy efficiency programs:

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"
}
}

Field Explanation: The rates object provides the latest prices for the requested commodities, allowing developers to quickly access current market conditions.

2. GET /historical

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

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"
}
}

Field Explanation: This response provides historical pricing data, which is essential for trend analysis and forecasting.

3. GET /timeseries

This endpoint retrieves 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"
}
}

Field Explanation: The rates object contains historical prices keyed by date, which is useful for visualizing trends over time.

4. GET /fluctuation

This endpoint provides start/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
}
}
}

Field Explanation: This response provides insights into price fluctuations, which can help traders and analysts make informed decisions.

Real-World Use Cases

Energy API can be leveraged in various ways to build impactful applications. Here are three concrete examples:

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 specific conditions are met.

2. ESG Dashboard

Energy professionals can build an Environmental, Social, and Governance (ESG) dashboard that visualizes carbon intensity data. By querying the /carbon-intensity endpoint, users can track emissions over time and assess their impact on sustainability goals.

3. Cost Calculator

A cost calculator can be developed to estimate monthly energy expenses based on current market prices. By using the /cost-estimate endpoint, developers can provide users with a simple interface to input their energy consumption 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. 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, 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. Each response includes currency information for the requested symbols, enabling developers to work with the currency that best suits their needs.

Conclusion

In conclusion, Energy API offers a powerful solution for developers and energy professionals seeking reliable market data without the complexities of traditional data sources. By providing a unified REST API that aggregates data from trusted providers, Energy API simplifies the process of accessing critical energy information.

Whether you are building a price alert system, an ESG dashboard, or a cost calculator, Energy API equips you with the tools you need to succeed in the energy market. With its comprehensive coverage, rich endpoints, and rapid development capabilities, Energy API is the fastest path from zero to production energy data.

Ready to get started? Try Energy API for free and unlock the potential of energy data for your applications today!