---
title: "GB grid carbon intensity (gCO2/kWh): current and 48h forecast, national or per region"
method: GET
path: "/v1/gb/carbon"
---

# GB grid carbon intensity (gCO2/kWh): current and 48h forecast, national or per region

`GET /v1/gb/carbon`

## Request

- Base URL: `https://data.greeneris.io` (the document declares no server; this is the origin it was published from)
- URL: `https://data.greeneris.io/v1/gb/carbon`
- Auth: none declared

Carbon intensity of Great Britain's electricity grid from the official NESO Carbon Intensity API (CC BY 4.0), in half-hour periods with a low/moderate/high index. No params -> current national half-hour; ?horizon=fw24h|fw48h adds the forecast; ?region=1..17 (13=London) switches to a DNO region and includes the generation mix per fuel. 30-min upstream cadence, 30-min cache.

## Query parameters

- `region` string
- `horizon` 'fw24h' | 'fw48h'

## Response `200`

Successful response

- unknown

---

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