Api for day ahead price + forecast

General
1

Hi everyone,

I am looking for a few Node-RED users who would like to test a new electricity price and CO2 forecast API in a real setup.

I did not build a custom Node-RED node for this first step on purpose. Instead, I started with a simple copy-paste approach:
import a flow, call the API via HTTP Request, and use the returned fields directly in your own automations.

The goal of this test phase is to find out:

  • whether the API structure works well in real Node-RED flows
  • whether the guide is easy enough to follow
  • whether the returned fields are sufficient for practical automations

The API logic is:

As soon as official day-ahead prices are available, those values are used.
Only for the remaining future period without official day-ahead coverage, forecast values are used.

So this is not just one long pure forecast. It is a mix of real market data first and forecast only for the still-open part.

There are currently two Node-RED paths:

  1. Summary endpoint
    This is the easier starting point.
    It returns current price, current CO2 intensity, cheapest and greenest windows, whether the cheapest window is active right now, plus meta information such as API key state and allowed horizon.

  2. Price-series endpoint
    This is for users who want to build their own logic inside Node-RED:
    custom window calculation, charts, thresholds, special cases, or their own decision logic.
    The price series can also be requested as a continuous 15-minute series.

Important:
Real day-ahead data stays truly 15-minute where available.
Forecast values are not artificially smoothed between hours. In 15-minute mode they are simply repeated across the four quarter-hour slots of the forecast hour.

Without an API key, you can already test with 48 hours.
For the actual test phase, I would like to hand out API keys manually so that the full 120h / 5-day horizon can also be tested in real flows.

Guide:

What would be especially helpful for me:

  • does the API call run reliably in Node-RED?
  • do the fields feel logical in real flows?
  • is the summary enough for most automations, or do you prefer the full price series?
  • would you automate mainly by price, CO2, or both?

Typical use cases would be:
EV charging, heat pump control, battery charging, immersion heater, or other flexible loads.

If you want to test it with api key and longer forecast period, feel free to send me a short Mail. Since I am new in this forum i cant post it here :smiley:

Helpful information would be:

  • which Node-RED setup you use
  • which country or price zone you need
  • whether you want to automate by price, CO2, or both
  • whether you would rather use the summary endpoint or the price series

Thanks for any feedback.