Open-Meteo API alternatives

Free weather API for non-commercial use. If it doesn't fit your project, here are the 10 best free Environment APIs to use instead in 2026, out of 29 in the directory.

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

1. 1

   kanari API

   Online · 527 ms

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

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Sähkön hinta nyt API

   Online · 1106 ms

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

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3W

   WattFigure API

   Online · 712 ms

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

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   GridVigil API

   Online · 1588 ms

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

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Danish data service Energi API

   Online · 867 ms

   Open energy data from Energinet to society.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
6. 6

   UK Carbon Intensity API

   Online · 869 ms

   The Official Carbon Intensity API for Great Britain developed by National Grid.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
7. 7

   PM2.5 Open Data Portal API

   Online · 1110 ms

   Open low-cost PM2.5 sensor data.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
8. 8

   Solematica API

   Online · 719 ms

   Compare Italian solar (photovoltaic) installer offers, energy prices (PUN/ARERA) and satellite roof data.

   • No API key needed
   • HTTPS

   No authHTTPSNo CORS
9. 9W

   Website Carbon API

   Online · 684 ms

   API to estimate the carbon footprint of loading web pages.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
10. 10

    Carbon Interface API

    Online · 873 ms

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

    • Callable from the browser (CORS)
    • HTTPS

    apiKeyHTTPSCORS

Open-Meteo API vs alternatives

Open-Meteo API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Open-Meteo	No	Yes	Yes	Up	609 ms	Not rated
kanari	No	Yes	Yes	Up	527 ms	Not rated
Sähkön hinta nyt	No	Yes	Yes	Up	1106 ms	Not rated
WWattFigure	No	Yes	Yes	Up	712 ms	Not rated
GridVigil	No	Yes	Yes	Up	1588 ms	Not rated
Danish data service Energi	No	Yes	Unknown	Up	867 ms	Not rated
UK Carbon Intensity	No	Yes	Unknown	Up	869 ms	Not rated
PM2.5 Open Data Portal	No	Yes	Unknown	Up	1110 ms	Not rated
Solematica	No	Yes	No	Up	719 ms	Not rated

See also: best Environment APIs · all Environment APIs