name: NESO Data Portal Plans
description: Access plans for the National Energy System Operator Data Portal APIs.
  Both the Carbon Intensity API and the NESO Data Portal CKAN API are freely available
  with no authentication required and no subscription fees. Access is governed by
  open data licensing (CC BY 4.0 / NESO Open Licence) rather than commercial tiers.
plans:
  - name: Free Open Access
    description: Full access to all publicly available datasets and endpoints with
      no API key, no registration, and no subscription required. Both the Carbon
      Intensity API (api.carbonintensity.org.uk) and the NESO Data Portal CKAN API
      (api.neso.energy) are open to all users at no cost.
    url: https://www.neso.energy/data-portal/api-guidance
    price: 0
    currency: GBP
    unit: month
    rateLimits:
      - name: CKAN Catalog API
        description: Maximum one request per second to catalog/search endpoints
        limit: 1
        unit: second
      - name: Datastore API
        description: Maximum two requests per minute to tabular data query endpoints
        limit: 2
        unit: minute
    features:
      - Full access to CKAN catalog endpoints (organization_list, package_list,
          package_search, resource_show, package_show)
      - Full access to Datastore query endpoints (datastore_search,
          datastore_search_sql)
      - Full access to Carbon Intensity API (national, regional, generation mix)
      - JSON response format
      - SQL-based filtering via PostgreSQL syntax
      - Postcode-level regional carbon intensity data
      - Up to 14 days date-range queries for carbon intensity
      - Up to 30 days date-range queries for carbon intensity statistics
      - 96+ hour ahead carbon intensity forecasts
      - No API key or registration required
    authentication:
      type: none
      description: No authentication required. All endpoints are publicly accessible.