# Grid Carbon Intensity API
GET/v1/griddata/carbon/{region}
gCO2 per kWh for Great Britain (region GB: actual and forecast for the current half hour) or a NESO distribution region id 1 to 17 (forecast and generation mix in basis points). Refreshes every 30 minutes.
Price
$0.005/ callEdge cache
900s
Uptime 24h
92.73%
p95
238ms
MCP tool
griddata_carbon-region
The Grid Carbon Intensity API provides gCO2 per kWh for Great Britain and NESO distribution regions. Data is refreshed every 30 minutes. The API endpoint is /carbon/{region} and it supports the GET method. The region parameter is required. The API costs $0.005 per request.
Parameters
| Name | In | Type | Description |
|---|---|---|---|
| region* | path | string |
Code
curl
# 1. No key, no payment: the gateway answers 402 with the price
curl -i "https://api.realtimeapi.ai/v1/griddata/carbon/GB"
# 2. Pay: retry with a signed x402 payment (any x402 client builds this header)
curl "https://api.realtimeapi.ai/v1/griddata/carbon/GB" -H "PAYMENT-SIGNATURE: $X402_PAYMENT"TypeScript · @x402/fetch
// npm i @x402/fetch @x402/core @x402/evm viem
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = x402Client.fromConfig({ schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }] });
const pay = wrapFetchWithPayment(fetch, client);
const data = await (await pay("https://api.realtimeapi.ai/v1/griddata/carbon/GB")).json();
console.log(data);Python · x402
# pip install "x402[requests,evm]==2.27.0" eth-account
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact import register_exact_evm_client
client = x402ClientSync()
register_exact_evm_client(client, EthAccountSigner(Account.from_key(PRIVATE_KEY)))
session = x402_requests(client)
print(session.get("https://api.realtimeapi.ai/v1/griddata/carbon/GB").json())With an API key
curl "https://api.realtimeapi.ai/v1/griddata/carbon/GB" -H "X-API-Key: $RTAPI_KEY"Frequently asked questions
What is the API endpoint?
/carbon/{region}
What is the API method?
GET
How often is the data refreshed?
Every 30 minutes
What is the cost per request?
$0.005