# Do you know good open web/api locations for market price estimates **URL:** \ **Category:** Questions & Help\ **Created:** [May 31, 2026, 7:43am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558 "2026-05-31T07:43:46Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Eko\_taas](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eko_taas/32/74256_2.png) [@Eko\_taas](https://community.homey.app/u/Eko_taas)\ **Post date:** [May 31, 2026, 7:43am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/1 "2026-05-31T07:43:46Z")
I am working (slowly) on advanced service to improve my own heaters timing optimization and starts to be ready for wider usage (prob. with fee). In selected method essential (not mandatory) is to “know” future prices longer than published by Nordpool… For Finland I fetch values from [Pörssisähkön hintaennuste](https://sahkovatkain.web.app/) / [nordpool-predict-fi/deploy/prediction.json at main · vividfog/nordpool-predict-fi · GitHub](https://github.com/vividfog/nordpool-predict-fi/blob/main/deploy/prediction.json) for 7+ days and for those values make some adjustments (e.g. adaptive corrections, adding 15min typical behavior) Was searching few times, but have not found similar data source for other regions (especially Scandinavia in my mind), and that would limit potential release to other price regions. If you have good hints for open web/api **forecast** price sources, appreciated if you share here (or link me to other discussion to fetch that data) * * * Idea is to have very simple api for heater(s), where always 7+ days advices are available and updated every hour (as new data comes in around that often). Then on web, all configuration, visuals for future siulations (below) and more… ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/5/7501ff0d20368b9675da781469732268d92e94b0.png) * * * - edit - Lets add also simulation from beg. 2026 to see winter challenge with realized pricing (simulation done on “what did know at that point of time” bases 🙂 (diff. heater, same location) ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/e/9e23f56a00beaa01e9b0f6208b7e6d02516f63c9.png) ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [June 1, 2026, 10:18am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/2 "2026-06-01T10:18:59Z")
Maybe this can be a start > **[Europe Power Price Forecast](https://eupowerprices.com/)** > **[EU Power Forecast API](https://eupowerprices.com/api/)** ---
**Author:** ![Eko\_taas](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eko_taas/32/74256_2.png) [@Eko\_taas](https://community.homey.app/u/Eko_taas)\ **Post date:** [June 4, 2026, 6:01am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/3 "2026-06-04T06:01:35Z")
Thanks, seems very close what I was looking for 🤩 ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [June 4, 2026, 10:10am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/4 "2026-06-04T10:10:52Z")
YW! When you got things working, please post the results, as your idea sounds very interesting. ---
**Author:** ![Eko\_taas](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eko_taas/32/74256_2.png) [@Eko\_taas](https://community.homey.app/u/Eko_taas)\ **Post date:** [June 4, 2026, 11:14am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/5 "2026-06-04T11:14:33Z")
My coming week should look like this 🙂 (and improved every hour as sources like weather, price forecasts etc keeps chanding at that phase) ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/f/df90e3a8a9449ffbd3ab65f4269a4e5bb9a45660.png) Waiting now for “EU Power Forecast” API keys, but did not ask for non-scandi data-sets (assuming in your “interest” is NL?). If you are interested as test user, let me know and I will ome back to you when “time has come”… My server has already simple WEB & API for DIY (using with my Homey already), also (not yet tested) Shelly Script (reporting and advice), as planning to move my heater controls (expect setting values) 100% out from Homey & Telldus (used as link to remote location) this summer… But if testing, consider some slo-mo, as too much other (family) things as well… ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [June 4, 2026, 4:43pm UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/6 "2026-06-04T16:43:54Z")
Oh I’m in no hurry at all. Yes I would be interested in Dutch data but that won’t involve that many changes I presume. But that’s my problem, not yours 😉😉 ---
**Author:** ![Eko\_taas](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eko_taas/32/74256_2.png) [@Eko\_taas](https://community.homey.app/u/Eko_taas)\ **Post date:** [July 2, 2026, 9:40am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/7 "2026-07-02T09:40:41Z")
While ensuring all working, has been surpriced to see that ENTSO-E has NL prices very late… Based on data collection (from 7. 6.) NL data successfully fetched only around 13:00 UTC or even 19:15 UTC), while Scandinavia values issued much earlier. Decided to add also humidity (and interacting heaters at same location) to model, testing ongoing and takes more time than thought… ---
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [July 2, 2026, 11:15am UTC](https://community.homey.app/t/do-you-know-good-open-web-api-locations-for-market-price-estimates/155558/8 "2026-07-02T11:15:08Z")
Maybe you can add [Stekker API](https://stekker.com/support/stekker-api-for-developers/) to the mix as well; The Power by the Hour app uses multiple providers to increase price data stability: ![Screenshot_20260702_000819_Homey](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/d/7/d7b32ec82a368828e0b861ac639cbc09fba31b9f.jpeg)