National Grid ESO

name: National Grid ESO
description: National Energy System Operator (NESO) provides open data APIs for the UK electricity system, including carbon
  intensity forecasts, demand data, generation mix, ancillary services, balancing costs, and operational data for Great Britain's
  electricity network. The Carbon Intensity API delivers 96+ hour ahead forecasts at both national and regional levels, while
  the NESO Data Portal (CKAN-based) exposes hundreds of datasets covering the full spectrum of electricity system operations.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Energy
- Electricity
- Carbon Intensity
- UK
- Open Data
- Sustainability
- Grid Operations
url: https://raw.githubusercontent.com/api-evangelist/national-grid/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
apis:
- name: Carbon Intensity API
  description: Official Carbon Intensity forecast API for Great Britain, developed by NESO in partnership with EDF Europe,
    University of Oxford, and WWF. Provides 96+ hour ahead national and regional carbon intensity forecasts, generation mix
    data, and historical carbon intensity statistics across 14 GB regions and by outward postcode.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://carbonintensity.org.uk/
  baseURL: https://api.carbonintensity.org.uk
  tags:
  - Carbon Intensity
  - Electricity
  - Sustainability
  - Forecasting
  - Generation Mix
  - Regional Data
  properties:
  - type: Documentation
    url: https://carbon-intensity.github.io/api-definitions/
  - type: OpenAPI
    url: https://carbon-intensity.github.io/api-definitions/
  - type: GitHubOrganization
    url: https://github.com/carbon-intensity
  - type: TermsOfService
    url: https://github.com/carbon-intensity/terms
  - type: License
    url: https://creativecommons.org/licenses/by/4.0/
  contact:
  - FN: NESO Carbon Intensity Team
    email: lyndon.ruff@nationalgrideso.com
  overlays:
  - type: APIs.io Search
    url: overlays/carbon-intensity-openapi-search.yml
  aid: national-grid:carbon-intensity-api
- name: NESO Data Portal API
  description: CKAN-based REST API providing programmatic access to hundreds of electricity system datasets published by the
    National Energy System Operator. Covers ancillary services, balancing costs, carbon intensity, connection registers, constraint
    management, demand forecasts, generation data, network charges, trading data, Future Energy Scenarios, and more. Rate
    limited to one request per second for the catalog API and two requests per minute for the Datastore (tabular data) API.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.neso.energy/data-portal
  baseURL: https://api.neso.energy/api/3/action
  tags:
  - Energy Data
  - Open Data
  - Demand Forecasting
  - Generation
  - Ancillary Services
  - Balancing Costs
  - Carbon Intensity
  - CKAN
  properties:
  - type: Documentation
    url: https://www.neso.energy/data-portal/api-guidance
  - type: ExternalDocumentation
    url: https://docs.ckan.org/en/2.8/api/
  - type: Portal
    url: https://www.neso.energy/data-portal
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/national-grid/refs/heads/main/rate-limits/neso-data-portal-rate-limits.yml
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/national-grid/refs/heads/main/plans/neso-data-portal-plans.yml
  contact:
  - FN: NESO Open Data Team
    email: box.OpenData.ESO@nationalgrideso.com
  overlays:
  - type: APIs.io Search
    url: overlays/neso-data-portal-openapi-search.yml
  aid: national-grid:neso-data-portal-api
common:
- type: Portal
  url: https://www.neso.energy/data-portal
- type: News
  url: https://www.neso.energy/news-and-events
- type: MediaCentre
  url: https://www.neso.energy/news-and-events/media-centre
- type: About
  url: https://www.neso.energy/
- type: License
  url: https://creativecommons.org/licenses/by/4.0/
- type: TermsOfService
  url: https://github.com/carbon-intensity/terms
- type: FAQ
  url: https://www.neso.energy/data-portal/about-data-portal
- type: Support
  url: mailto:box.OpenData.ESO@nationalgrideso.com
- type: GitHubOrganization
  url: https://github.com/carbon-intensity
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com