Environment — entry 018 of 18
Website Carbon
Website Carbon estimates the CO2 emitted by loading a web page, based on page weight and whether the host uses green hosting, returning a digital carbon rating alongside the raw gCO2e figure. As of 14 July 2025 the provider retired public access to its convenience /site endpoint (which fetched a URL for you); the /data endpoint, which takes bytes and a green-hosting flag directly, remains free and open with no key.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score74
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
Embed this badge
<a href="https://greatapis.com/api/website-carbon/"><img src="https://greatapis.com/badge/website-carbon.svg" alt="Scored 74 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.