# National Energy System Operator (NESO)

**Canonical:** https://apis.io/providers/neso/  
**Website:** https://www.neso.energy/  
**APIs profiled:** 2

The National Energy System Operator (NESO) is Great Britain's publicly owned, operationally independent electricity system operator and whole-energy system planner, created on 1 October 2024 when the UK government purchased National Grid Electricity System Operator Limited and folded in gas system planning from National Gas Transmission. NESO balances the GB electricity system in real time, runs the connections queue, publishes Future Energy Scenarios, and sits at the centre of the value chain between generators, interconnectors, transmission and distribution networks, and suppliers. Its API posture is the sector's classic split, and NESO lands firmly on the open side of that split. Market and system data is genuinely open and anonymous - the NESO Data Portal exposes 128 datasets over a public CKAN API at api.neso.energy with no key, no account and no application, all under the permissive NESO Open Data Licence, and the Carbon Intensity API for Great Britain that NESO develops is one of the most openly consumed public energy APIs in the world. There is no consumer data surface at all, and none is expected, because NESO holds no retail customer relationships, Britain has no consumer energy data-portability mandate comparable to the Australian Consumer Data Right, and smart-meter consumption data travels through the licensed Smart DCC monopoly rather than through the system operator. NESO's open-data obligation comes from Ofgem's Data Best Practice Guidance embedded in its RIIO-2 licence, and unlike most of the sector that obligation is visibly implemented rather than merely claimed.

## Kin Score — 31.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.6).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 44.6 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Energy & Utilities**: 41.9 (matched via tags).

## Agent readiness — 18.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free - Open, no registration — onboarding: open, pricing: free, trial: no (confidence: high).

## APIs (2)

- **NESO Data Portal API** — The public CKAN 2.8.7 API behind the NESO Data Portal, serving 128 open datasets covering GB electricity demand, generation, balancing, ancillary services, constraints, intercon...
- **Carbon Intensity API** — The official Carbon Intensity API for Great Britain, developed by NESO, giving national and regional carbon intensity of GB electricity - actual, forecast up to 96+ hours ahead,...

## MCP servers (1)

- **National Energy System Operator (NESO) MCP Server** — NESO operates NO first-party MCP server. This is a CANDIDATE tool design for one, derived from the two live anonymous APIs. Both surfaces are unusually well suited to MCP: no au...

## Security (3)

- **Neso Authentication** — none · 0 schemes
- **Neso Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Neso Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Tags

Energy, United Kingdom, Electricity, Energy Markets, Grid, Open Data, Carbon, Renewables, Gas, Demand Response

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/neso/). Scores are computed from the provider's own public artifacts under a published rubric.