Open-Meteo API vs WattFigure API

Two free Environment APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose Open-Meteo API if its data fits your use case better; on access and reliability it's level with WattFigure API.
Choose WattFigure API if its data fits your use case better; on access and reliability it's level with Open-Meteo API.

Side by side

	Open-Meteo API	WattFigure API
What it does	Free weather API for non-commercial use.	US electricity rates by state, with appliance and EV charging running costs.
Provider	Open-Meteo.com	WattFigure API
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 609 ms	Online · 712 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Open-Meteo docs ↗WattFigure docs ↗

Open-Meteo API

Free weather API for non-commercial use.

Open-Source ☀️ Weather API with free access for non-commercial use. No API Key required ✅. Accurate weather forecasts for any location. Open-Meteo provides high-resolution open data ranging from 1 to 11 kilometres from national weather services. With a user-friendly JSON API, integrating weather da…

Strengths

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

Ratings, reviews and FAQ →

WattFigure API

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

Strengths

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

Ratings, reviews and FAQ →

How to choose between them

Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Open-Meteo vs WattFigure FAQ

Do Open-Meteo API and WattFigure API need an API key?

Neither needs an API key; you can call both straight away.

More comparisons

Open-Meteo API alternatives · WattFigure API alternatives · best Environment APIs