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Carbon Interface

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

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API keyHTTPSCORSEnvironment

Verified 4 days ago: 100% uptime

API key

Required

HTTPS

Supported

Browser calls

Yes, CORS enabled

Status

Live · 100/100

What our checks found

Health score
100/100
Reliability
100%
Average latency
781ms

Last checked 2026-09-18. Measured independently, not self-reported by the provider.

How to call it

A starting template for Carbon Interface. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.

# Requires an API key. Check the docs for whether it goes in a header or a query parameter.
curl -s "https://docs.carboninterface.com/ENDPOINT" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json"

Where this listing comes from

Aggregated from one public source (public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.

Other Environment APIs

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DC Hub

Environment

Live data on data-center facilities, power markets, grid telemetry, and fiber infrastructure

No keyCORSHTTPS

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Luchtmeetnet

Environment

Predicted and actual air quality components for The Netherlands (RIVM)

No keyCORSHTTPS

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Open-Meteo

Environment

Global weather forecast API for non-commercial use

No keyCORSHTTPS

Verified 4 days ago: 100% uptime

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Open-Meteo Marine

Environment

Ocean wave height, swell, sea temperature and marine weather data

No keyCORSHTTPS

Verified 4 days ago: 100% uptime

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UK Carbon Intensity

Environment

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

No keyCORSHTTPS

Verified 4 days ago: 100% uptime

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WattFigure

Environment

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

No keyCORSHTTPS

Verified 4 days ago: 100% uptime

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Carbon Interface — common questions

Answered from what our own scheduled checks found, not from the provider's marketing.

Is Carbon Interface free to use?

Carbon Interface is listed in our free catalogue, but it requires an API key, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.

Does Carbon Interface need an API key?

Yes. Carbon Interface authenticates with an API key. Keep it server-side rather than in browser code, because anything in your frontend bundle is readable by anyone who opens developer tools.

Can I call Carbon Interface from browser JavaScript?

Yes. Carbon Interface returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.

Is Carbon Interface still working?

Yes, as of 2026-09-18. Our automated check reached Carbon Interface and recorded a 100% reliability score with a median response time of 781 ms. We re-check on a schedule, and this page updates with the result.

Is Carbon Interface available over HTTPS?

Yes. Carbon Interface serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.