National Grid ESO

NESO Data Portal API

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.

GitHub

Documentation

📖
Documentation
https://www.neso.energy/data-portal/api-guidance
📖
RateLimits
https://raw.githubusercontent.com/api-evangelist/national-grid/refs/heads/main/rate-limits/neso-data-portal-rate-limits.yml

Other Resources

🔗
ExternalDocumentation
https://docs.ckan.org/en/2.8/api/
🔗
Portal
https://www.neso.energy/data-portal
🔗
Plans
https://raw.githubusercontent.com/api-evangelist/national-grid/refs/heads/main/plans/neso-data-portal-plans.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/neso-data-portal-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
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