Live GB grid carbon intensity (gCO2/kWh) now API

Current Great Britain national-grid carbon intensity in gCO2/kWh from National Grid ESO, normalized with a low/high index and an actionable load-shifting verdict. Answers 'how dirty is UK electricity right now?', 'is this a good time to charge my EV?'.

Price$0.01per request

MethodPOST

Route/v1/climate/uk-carbon-intensity

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache900s public

climateenergycarbon-intensitygridukgbco2electricitydemand-response

API URLhttps://x402.hexl.dev/v1/climate/uk-carbon-intensity

Integration docs

Example request

{}

Example response

{
  "region": "Great Britain (national grid)",
  "from": "2026-06-04T23:30Z",
  "to": "2026-06-05T00:00Z",
  "gramsCO2PerKWh": 62,
  "isActual": true,
  "index": "low",
  "advice": "Cleaner than average — good time to shift flexible loads here."
}

Input schema

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}