National Grid Carbon Intensity API (UK)
National Grid Carbon Intensity REST API for developers and energy management systems to access real-time and 48-hour forecasted carbon intensity data for the UK electricity grid — a free, open API developed by National Grid ESO, WWF, and Oxford University providing granular regional and national carbon intensity data to enable carbon-aware computing and energy optimization in the UK. Enables AI agents to manage national UK carbon intensity for clean energy scheduling automation, handle regional carbon data for area-specific load optimization automation, access 48-hour forecast for predictive energy management automation, retrieve generation mix for renewable energy tracking automation, manage statistics for carbon accounting automation, handle regional comparison for grid zone selection automation, access pt-ahead forecast for intraday optimization automation, retrieve historical data for trend analysis automation, manage intensity factors for carbon calculation automation, and integrate UK Carbon Intensity API with building management, EV charging, and sustainability reporting for UK carbon-aware automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Open data. No auth. UK. Grid carbon data.
⚡ Reliability
Best When
A UK-based developer, building management system, or sustainability team wanting AI agents to access free real-time and forecasted UK grid carbon intensity data for carbon-aware computing, EV charging, and energy optimization.
Avoid When
UK-ONLY COVERAGE: Carbon Intensity API covers only England, Scotland, and Wales; automated Europe or global coverage assumption creates no_region_data; automated non-UK applications must use Electricity Maps or WattTime for broader coverage. NO AUTH — RATE LIMITS APPLY: Carbon Intensity API requires no authentication but has rate limits (10 req/second); automated aggressive polling creates rate limiting; automated should implement reasonable polling frequency (max every 5 minutes). FORECAST ACCURACY DECREASES: 48-hour forecast accuracy degrades beyond 12-24 hours; automated equal-weight forecast assumption creates poor scheduling decisions for far-future slots; automated should weight near-term forecast more heavily. DATA MAY HAVE LATENCY: Real-time carbon data may lag by up to 30 minutes; automated truly real-time assumption creates slightly delayed carbon signal; automated should account for data latency in time-sensitive optimization.
Use Cases
- • Scheduling flexible UK energy loads to lower-carbon grid periods for building management automation agents
- • Accessing 48-hour UK grid carbon intensity forecast for EV charging optimization automation agents
- • Tracking UK regional carbon intensity variations for distributed energy management automation agents
- • Generating UK electricity carbon accounting data for Scope 2 emissions reporting automation agents
Not For
- • Non-UK grid carbon data (this API covers England, Scotland, and Wales only — not Ireland, EU, or global)
- • Real-time electricity pricing (Carbon Intensity API provides carbon data only, not tariff data)
- • High-availability production systems requiring SLA (this is an open/free API without formal SLA)
Interface
Authentication
Carbon Intensity API requires no authentication — completely open access. REST API with JSON. UK. Developed by National Grid ESO, WWF UK, Oxford University, Severn Trent, and others. Open source (GitHub). Products: National/regional intensity, 48-hour forecast, generation mix, statistics. SDKs: None official (community wrappers available). Coverage: England, Scotland, Wales (not Northern Ireland). Data updates every 30 minutes. Free, no registration needed.
Pricing
UK. National Grid ESO / WWF / Oxford Univ. Free open data. No auth. 10 req/sec limit.
Agent Metadata
Known Gotchas
- ⚠ NO AUTHENTICATION REQUIRED: Carbon Intensity API requires no API key or registration; automated auth-header requirement assumption creates unnecessary overhead; automated can call endpoints directly without any Authorization header
- ⚠ UK-ONLY COVERAGE: API covers England, Scotland, Wales only; automated pan-EU or global coverage assumption creates empty response for non-UK zones; automated must use Electricity Maps or WattTime for non-UK carbon data
- ⚠ 30-MINUTE DATA GRANULARITY: Carbon intensity data updates every 30 minutes (at :00 and :30); automated sub-30-minute monitoring creates duplicate data reads; automated should poll at 30-minute intervals maximum
- ⚠ REGIONAL CODES FOR REGIONAL DATA: UK regional data uses DNO (Distribution Network Operator) region codes (e.g., 1-17); automated geographic lookup without region code creates missing regional data; automated must map postcode or coordinates to DNO region code
- ⚠ FORECAST IS PROBABILISTIC: 48-hour forecasts are probabilistic with decreasing accuracy; automated equal-confidence forecast assumption creates poor far-future scheduling; automated should weight forecast confidence by proximity to current time
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Scores are editorial opinions as of 2026-03-07.