National Grid Electricity Distribution (NGED) is the licensed electricity distribution network operator for the Midlands, the South West of England and South Wales — the poles-and-wires DNO that delivers power to over 7.9 million customers across roughly 55,500 square kilometres, formed when National Grid acquired Western Power Distribution in 2021. It sits between the transmission network and the retail suppliers, owning the physical network, the connection queue and the low-voltage measurement estate, while selling nothing to consumers directly. Its home market is the United Kingdom, where there is no consumer data-portability mandate equivalent to Australia's Consumer Data Right: individual household smart-meter data flows through the licensed Smart DCC monopoly and the energy suppliers, not through the distributor. What Britain mandated instead lands squarely on NGED — Ofgem's Data Best Practice Guidance is a licence condition on every DNO, and NGED has actually implemented it. The Connected Data Portal at connecteddata.nationalgrid.co.uk is a live CKAN 2.9.8 instance carrying 91 datasets and 8,687 resources under a genuine open licence derived from the Open Government Licence v3.0, with a documented public CKAN Action API, published API-token guidance, and DCAT catalogue exports in JSON-LD, Turtle, N3 and RDF/XML. The posture is therefore the inverse of most utilities in this study: open, documented and machine-readable on grid and market data — including the Ofgem-mandated aggregated smart-meter consumption data at LV feeder and secondary substation level — and completely absent on individual consumer data, which the distributor is neither obliged nor equipped to expose. Anonymous callers get the full catalogue and 774 resource payloads; the other 7,913 are redacted behind a free, self-serve, email-verified account.
National Grid Electricity Distribution publishes 2 APIs on the APIs.io network. Tagged areas include Energy, United Kingdom, Utilities, Electricity, and Grid.
The National Grid Electricity Distribution catalog on APIs.io includes 1 JSON-LD context.
National Grid Electricity Distribution’s developer surface includes authentication, API reference, getting-started guide, FAQ, developer portal, documentation, signup flow, and 28 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Energy & Utilities regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
The public CKAN 2.9.8 Action API behind National Grid Electricity Distribution's Connected Data Portal, documented by NGED on its own API Guidance page. Exposes the DNO's open d...
Machine-readable DCAT catalogue exports of the entire NGED Connected Data Portal, linked from the footer of every portal page and served anonymously in four serialisations — JSO...
aid: national-grid-electricity-distribution
url: https://raw.githubusercontent.com/api-evangelist/national-grid-electricity-distribution/refs/heads/main/apis.yml
name: National Grid Electricity Distribution
kind: company
description: 'National Grid Electricity Distribution (NGED) is the licensed electricity distribution network operator for
the Midlands, the South West of England and South Wales — the poles-and-wires DNO that delivers power to over 7.9 million
customers across roughly 55,500 square kilometres, formed when National Grid acquired Western Power Distribution in 2021.
It sits between the transmission network and the retail suppliers, owning the physical network, the connection queue and
the low-voltage measurement estate, while selling nothing to consumers directly. Its home market is the United Kingdom,
where there is no consumer data-portability mandate equivalent to Australia''s Consumer Data Right: individual household
smart-meter data flows through the licensed Smart DCC monopoly and the energy suppliers, not through the distributor. What
Britain mandated instead lands squarely on NGED — Ofgem''s Data Best Practice Guidance is a licence condition on every DNO,
and NGED has actually implemented it. The Connected Data Portal at connecteddata.nationalgrid.co.uk is a live CKAN 2.9.8
instance carrying 91 datasets and 8,687 resources under a genuine open licence derived from the Open Government Licence
v3.0, with a documented public CKAN Action API, published API-token guidance, and DCAT catalogue exports in JSON-LD, Turtle,
N3 and RDF/XML. The posture is therefore the inverse of most utilities in this study: open, documented and machine-readable
on grid and market data — including the Ofgem-mandated aggregated smart-meter consumption data at LV feeder and secondary
substation level — and completely absent on individual consumer data, which the distributor is neither obliged nor equipped
to expose. Anonymous callers get the full catalogue and 774 resource payloads; the other 7,913 are redacted behind a free,
self-serve, email-verified account.'
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: medium
source:
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source:
- authentication
- security
generated: '2026-09-03'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Energy
- United Kingdom
- Utilities
- Electricity
- Grid
- Distribution Network
- Open Data
- Smart Metering
- DER
- Flexibility
- Renewables
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.23'
apis:
- aid: national-grid-electricity-distribution:nged-connected-data-api
name: NGED Connected Data Portal API
description: 'The public CKAN 2.9.8 Action API behind National Grid Electricity Distribution''s Connected Data Portal, documented
by NGED on its own API Guidance page. Exposes the DNO''s open data catalogue — 91 datasets, 8,687 resources, 155 tags
and 6 data groups (connection, demand, flexibility, innovation, system-and-network, system-planning) — covering live power
cuts, live primary and secondary substation measurements, LV load monitoring, the Embedded Capacity Register, the generation
capacity register, distribution substation data and the Ofgem-mandated aggregated smart meter consumption data. Catalogue-level
calls (package_list, package_search, package_show, group_list, group_show, tag_list, status_show) return 200 anonymously.
Resource-level calls (resource_show, datastore_search) and the majority of resource download URLs are gated behind a free
API token, returning "Access denied: Resource access restricted to registered users".'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://connecteddata.nationalgrid.co.uk/api-guidance
baseURL: https://connecteddata.nationalgrid.co.uk/api/3/action/
tags:
- Open Data
- Electricity
- Distribution Network
- Grid
- Smart Metering
- Flexibility
- CKAN
properties:
- type: Documentation
url: https://connecteddata.nationalgrid.co.uk/api-guidance
- type: APIReference
url: https://docs.ckan.org/en/latest/api/index.html
- type: Portal
url: https://connecteddata.nationalgrid.co.uk/
- type: Datasets
url: https://connecteddata.nationalgrid.co.uk/dataset/
- type: Authentication
url: https://connecteddata.nationalgrid.co.uk/api-guidance
- type: Authentication
url: authentication/national-grid-electricity-distribution-authentication.yml
- type: Conventions
url: conventions/national-grid-electricity-distribution-conventions.yml
- type: ErrorCatalog
url: errors/national-grid-electricity-distribution-problem-types.yml
- type: DataModel
url: data-model/national-grid-electricity-distribution-data-model.yml
- type: X-MCPServerCandidate
url: mcp/national-grid-electricity-distribution-mcp.yml
note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list
derived from the published API contracts, not an existing server. The scorer already read the manifest and reported
mcp_server correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: SignUp
url: https://connecteddata.nationalgrid.co.uk/user/register
- type: GettingStarted
url: https://connecteddata.nationalgrid.co.uk/registration-and-subscription
- type: Documentation
url: https://connecteddata.nationalgrid.co.uk/registration-and-subscription
- type: License
url: https://www.nationalgrid.co.uk/open-data-licence
- type: Support
url: https://connecteddata.nationalgrid.co.uk/contact
- aid: national-grid-electricity-distribution:nged-connected-data-catalogue
name: NGED Connected Data DCAT Catalogue
description: Machine-readable DCAT catalogue exports of the entire NGED Connected Data Portal, linked from the footer of
every portal page and served anonymously in four serialisations — JSON-LD (205 KB), Turtle (112 KB), N3 and RDF/XML. Not
a REST API but a genuine, versionless, contract-shaped harvesting surface for the DNO's full 91-dataset catalogue.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://connecteddata.nationalgrid.co.uk/
baseURL: https://connecteddata.nationalgrid.co.uk/
tags:
- Open Data
- DCAT
- JSON-LD
- Catalog
properties:
- type: JSONLD
url: https://connecteddata.nationalgrid.co.uk/catalog.jsonld
- type: JSONLD
url: json-ld/national-grid-electricity-distribution-catalog.jsonld
- type: Vocabulary
url: vocabulary/national-grid-electricity-distribution-vocabulary.yml
- type: Data
url: https://connecteddata.nationalgrid.co.uk/catalog.ttl
- type: Data
url: https://connecteddata.nationalgrid.co.uk/catalog.xml
- type: Data
url: https://connecteddata.nationalgrid.co.uk/catalog.n3
- type: Portal
url: https://connecteddata.nationalgrid.co.uk/
- type: License
url: https://www.nationalgrid.co.uk/open-data-licence
common:
- type: DomainSecurity
url: security/national-grid-electricity-distribution-domain-security.yml
- type: Authentication
url: authentication/national-grid-electricity-distribution-authentication.yml
- type: Conventions
url: conventions/national-grid-electricity-distribution-conventions.yml
- type: ErrorCatalog
url: errors/national-grid-electricity-distribution-problem-types.yml
- type: Conformance
url: conformance/national-grid-electricity-distribution-conformance.yml
- type: Vocabulary
url: vocabulary/national-grid-electricity-distribution-vocabulary.yml
- type: DataModel
url: data-model/national-grid-electricity-distribution-data-model.yml
- type: Lifecycle
url: lifecycle/national-grid-electricity-distribution-lifecycle.yml
- type: X-MCPServerCandidate
url: mcp/national-grid-electricity-distribution-mcp.yml
note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Packages
url: packages/national-grid-electricity-distribution-packages.yml
- type: LLMsTxt
url: llms/national-grid-electricity-distribution-llms.txt
- type: JSONLD
url: json-ld/national-grid-electricity-distribution-catalog.jsonld
- type: APIReference
url: https://docs.ckan.org/en/latest/api/index.html
- type: GettingStarted
url: https://connecteddata.nationalgrid.co.uk/registration-and-subscription
- type: HelpCenter
url: https://connecteddata.nationalgrid.co.uk/help
- type: FAQ
url: https://connecteddata.nationalgrid.co.uk/faq
- type: Login
url: https://connecteddata.nationalgrid.co.uk/user/login
- type: Website
url: https://www.nationalgrid.co.uk/
- type: About
url: https://connecteddata.nationalgrid.co.uk/about
- type: Portal
url: https://connecteddata.nationalgrid.co.uk/
- type: Documentation
url: https://connecteddata.nationalgrid.co.uk/api-guidance
- type: SignUp
url: https://connecteddata.nationalgrid.co.uk/user/register
- type: License
url: https://www.nationalgrid.co.uk/open-data-licence
- type: PrivacyPolicy
url: https://www.nationalgrid.co.uk/privacy-policy
- type: TermsOfService
url: https://www.nationalgrid.co.uk/terms-and-conditions
- type: Support
url: https://connecteddata.nationalgrid.co.uk/contact
- type: CaseStudies
url: https://connecteddata.nationalgrid.co.uk/case-studies
- type: Data
url: https://connecteddata.nationalgrid.co.uk/dataset/
- type: Documentation
url: https://commercial.nationalgrid.co.uk/digitalisation-and-data
- type: Portal
url: https://dso.nationalgrid.co.uk/
- type: Portal
url: https://powercuts.nationalgrid.co.uk/
- type: Portal
url: https://planned.nationalgrid.co.uk/
- type: Portal
url: https://connections.nationalgrid.co.uk/
- type: Portal
url: https://commercial.nationalgrid.co.uk/network-opportunity-map
- type: Documentation
url: https://www.nationalgrid.co.uk/electricity-distribution
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
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