Index onlineMerchant portal
Api Endpoint

Greenis Carbon API

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.

Open interactive test console

Offering

Provider
data.greeneris.io
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Weather And Environment
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://data.greeneris.io/v1/gb/carbon
MIME type
application/json
First seen
2026-10-16T01:51:20.002Z
Last seen
Tags
energy, carbon, co2, grid, uk, esg

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff"
  }
]

Observed health

Status
Healthy
Latest latency
100 ms
Average latency
558 ms
HTTP status
402
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "region": {
          "type": "string",
          "description": "DNO regionid 1-17 (optional; 13=London)"
        },
        "horizon": {
          "type": "string",
          "enum": [
            "fw24h",
            "fw48h"
          ],
          "description": "Forecast window from now (optional)"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "json",
  "example": {
    "unit": "gCO2/kWh",
    "count": 1,
    "scope": "regional",
    "region": {
      "dno": "UKPN London",
      "name": "London",
      "regionid": 13
    },
    "source": "Carbon Intensity API, National Energy System Operator (NESO), CC BY 4.0",
    "periods": [
      {
        "to": "2026-07-14T06:00Z",
        "from": "2026-07-14T05:30Z",
        "index": "low",
        "forecast": 81,
        "generation_mix": {
          "gas": 20.5,
          "wind": 34.2,
          "solar": 25,
          "nuclear": 8.1
        }
      }
    ]
  }
}