API · /carbonintensity-api

Carbon Intensity API

healthy 4,400 Subscribers

Great Britain\x27s electricity grid carbon intensity as an API, from the official National Grid ESO Carbon Intensity service. Get the live national carbon intensity in grams of CO2 per kWh with its index (very low to very high), the current generation mix showing exactly how much of the grid is gas, wind, solar, nuclear, biomass, hydro, coal and imports right now (with the renewable and zero-carbon percentages worked out for you), today\x27s half-hourly intensity timeline, the carbon intensity of all 18 GB regions, the intensity and fuel mix for any UK postcode, and the gCO2/kWh emission factor of each fuel type. This is exactly the data you need to shift EV charging, heat pumps, laundry and batteries to the greenest, cheapest half-hours. Perfect for smart-home and energy apps, EV-charging schedulers, sustainability dashboards, carbon-aware computing and climate tools. Covers Great Britain. No accounts, no upstream key.

#carbon-intensity #energy #electricity #grid #sustainability #renewable

api.oanor.com/carbonintensity-api

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Machine-readable spec so AI agents can integrate this API.

/api/carbonintensity-api/openapi.json

/api/carbonintensity-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 445 ms; Server probes · 24h
Subscribers: 4,400; active
Total calls: 28; last 7 days

Full status page → · 35 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

3,400 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
3,400 calls/month
2 req/sec
National, regional & generation mix
No credit card

Starter

€4.10 /month

44,000 calls / month
5 requests / second
Hard cap (429 above quota, no overage)
44k calls/month
5 req/sec
Postcode & forecast
Email support

Pro

€13.40 /month

212,000 calls / month
15 requests / second
Hard cap (429 above quota, no overage)
212k calls/month
15 req/sec
EV-charging & energy apps
Priority support

Mega

€38.20 /month

1,055,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
1.055M calls/month
40 req/sec
Carbon-aware platforms
Dedicated SLA

Built by

PremiumApi

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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Carbon Intensity API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Carbon Intensity API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Carbon Intensity API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does Carbon Intensity API cost?

Carbon Intensity API has a free tier with 100 calls / month. Paid plans start at €4.10 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is Carbon Intensity API GDPR-compliant?

All requests to Carbon Intensity API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Intensity 3

Regional 2

Usage notes

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/carbonintensity-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/carbonintensity-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/carbonintensity-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/carbonintensity-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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