Creating Sustainable Urban Energy Plans: The Role of Energy API in Smart City Initiatives

Introduction

As urban populations continue to grow, cities face increasing pressure to develop sustainable energy solutions. The challenge lies in creating energy plans that not only meet current demands but also anticipate future needs while minimizing environmental impact. Traditional methods of gathering energy market data can be cumbersome, often requiring developers to scrape multiple government portals or stitch together incompatible data formats. This is where Energy API comes into play, offering a unified solution that simplifies access to critical energy market data.

In this blog post, we will explore how Energy API can empower developers, data engineers, and sustainability teams to create effective urban energy plans. By leveraging a single REST API that aggregates wholesale energy market data from trusted sources, users can streamline their workflows and focus on building innovative solutions for smart cities.

Why Energy API

Energy API stands out in the crowded landscape of energy data providers due to its unique features that cater specifically to the needs of developers and energy professionals. Here are a few key differentiators:

• Unified Data Access: Instead of dealing with multiple APIs, each with its own format and schedule, Energy API provides a single normalized REST surface. This means developers can access data from sources like OMIE, ENTSO-E, and EIA without the headache of managing different formats.
• Comprehensive Coverage: With over 39 symbols across six commodity categories—electricity, gas, oil, coal, carbon, and carbon intensity—Energy API offers extensive market data. This allows developers to query multiple commodities in a single API call, saving time and reducing complexity.
• 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.
• Reliable Data Sources: Energy API aggregates data from trusted providers, ensuring that users receive accurate and up-to-date information. This reliability is crucial for making informed decisions in energy trading and sustainability initiatives.

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 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 that cater to different data needs. Here are four core endpoints relevant to urban energy planning:

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 essential for forecasting and planning.

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, allowing 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 valuable insights into price movements, helping developers assess market volatility and make informed decisions.

Real-World Use Cases

Energy API can be utilized in various applications that enhance urban energy planning and management. Here are three concrete examples:

• Price Alert System: Developers can build a price alert system that notifies users when energy prices exceed a certain threshold. By using the /latest endpoint, they can monitor real-time prices and trigger alerts based on user-defined criteria.
• ESG Dashboard: Sustainability teams can create dashboards that visualize energy consumption and carbon emissions data. By leveraging the /carbon-intensity and /latest endpoints, they can provide insights into the environmental impact of energy usage.
• Cost Calculator: Fintech teams can develop cost calculators that estimate monthly energy expenses based on current market prices. Using the /cost-estimate endpoint, they can provide users with accurate estimates based on their energy consumption patterns.

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 prices through the /latest endpoint.

Can I get historical energy prices going back 5 years?

Yes, Energy API provides historical data for various symbols. Users can retrieve historical prices using the /historical and /timeseries endpoints, allowing for analysis over extended periods.

Does the API support multiple currencies?

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

Conclusion

In conclusion, creating sustainable urban energy plans requires access to reliable and comprehensive energy market data. Energy API simplifies this process by providing a unified interface that aggregates data from trusted sources, enabling developers to focus on building innovative solutions for smart cities. With features like real-time pricing, historical data access, and fluctuation analysis, Energy API is the fastest path from zero to production energy data.

Ready to take your urban energy planning to the next level? Try Energy API for free today and unlock the potential of your energy data!