National Energy System Operator (NESO)
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.
National Energy System Operator (NESO) is tracked in the API Evangelist network. This page is the human-readable profile that sits on top of the machine-readable index we maintain at apis.io.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
National Energy System Operator (NESO) is in the network as a tracked entity. We haven't yet indexed a public API surface for it — when one is published, the artifacts, score, and agent-readiness read will appear here automatically. The source repository is where that profile is built.
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