Spotwatts API alternatives

Nordic and Baltic day-ahead electricity prices, 15-minute and hourly, with VAT, for 15 price areas. If it doesn't fit your project, here are the 10 best free Environment APIs to use instead in 2026, out of 34 in the directory.

For reference, Spotwatts API: No API key needed · Callable from the browser (CORS) · HTTPS.

1. 1

   PixelGust Soil API

   Online · 924 ms

   Soil properties at 6 depths for any point (SoilGrids 2.0, 250 m), ISRIC-compatible.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Calendrier Tempo API

   Online · 1225 ms

   French EDF Tempo tariff: today's and tomorrow's colour, kWh prices and 15-day colour forecasts.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   GridVigil API

   Online · 2308 ms

   Pressure scores, demand, generation mix and alerts for the 10 major U.S. power grids.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   kanari API

   Online · 1256 ms

   Real-time worldwide wildfire detections, water bomber tracking and open fire archive.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Open-Meteo API

   Online · 1203 ms

   Free weather API for non-commercial use.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   Sähkön hinta nyt API

   Online · 1990 ms

   Finnish and Nordic day-ahead electricity spot prices (15-minute), cheapest hours.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   SpotWave API

   Online · 1589 ms

   Day-ahead electricity prices for 40+ European market zones, incl. taxes and VAT.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8W

   WattFigure API

   Online · 1349 ms

   US electricity rates by state, with appliance and EV charging running costs.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
9. 9

   Carbon Interface API

   Online · 724 ms

   API to calculate carbon (C02) emissions estimates for common C02 emitting activities.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
10. 10

    CO2 Offset API

    Online · 2706 ms

    API calculates and validates the carbon footprint.

    • No API key needed
    • 100% uptime (30 days)
    • HTTPS

    No authHTTPSCORS ?

Spotwatts API vs alternatives

Spotwatts API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Spotwatts	No	Yes	Yes	Up	2214 ms	Not rated
PixelGust Soil	No	Yes	Yes	100%	924 ms	Not rated
Calendrier Tempo	No	Yes	Yes	100%	1225 ms	Not rated
GridVigil	No	Yes	Yes	100%	2308 ms	Not rated
kanari	No	Yes	Yes	100%	1256 ms	Not rated
Open-Meteo	No	Yes	Yes	100%	1203 ms	Not rated
Sähkön hinta nyt	No	Yes	Yes	100%	1990 ms	Not rated
SpotWave	No	Yes	Yes	100%	1589 ms	Not rated
WWattFigure	No	Yes	Yes	100%	1349 ms	Not rated

See also: best Environment APIs · all Environment APIs