Elexon
Elexon is the UK's Balancing and Settlement Code (BSC) Company, responsible for administering the electricity balancing and settlement arrangements in Great Britain. As the operator of the Balancing Mechanism Reporting Service (BMRS), Elexon publishes a publicly accessible REST API — the Insights Solution API — that provides free, no-key access to real-time and historical data from the UK electricity market. The API covers balancing mechanism dynamic and physical data per Balancing Mechanism Unit (BMU), bid-offer acceptances, balancing services adjustments, physical notifications, generation availability forecasts, settlement reports, meter readings, and UK market transparency data mandated under European legislation. All data is returned in JSON, XML, or CSV format. A companion near-real-time push service (IRIS — Insights Real-time Information Service) streams the same datasets over WebSocket/STOMP for latency-sensitive consumers. The API is freely accessible to industry participants and the public with no registration or API key required, and data may be reused with attribution ("Contains BMRS data © Elexon Limited copyright and database right").
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Elexon the way a machine reads it — 355 machine-readable artifacts across 32 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
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. From those artifacts we compute the Kin Score — Elexon scores 51.7/100 (developing), with a separate agent-readiness read of 39/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Elexon
Each block below is one kind of artifact we hold for Elexon. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 32
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Elexon Balancing Mechanism Dynamic API
Dynamic data.
Elexon Balancing Mechanism Physical API
Physical data consists of PN, QPN, MILS, & MELS.
Elexon Balancing Services Adjustment - Disaggregated API
Adjustment actions (DISBSAD) for a given settlement period, or summarised by settlement period over a time range.
Elexon Balancing Services Adjustment - Net API
Net balancing services adjustment data (NETBSAD), provided as a time series or filtered to events.
Elexon Bid-Offer Acceptances API
Bid-offer acceptance data (BOALF).
Elexon Bid-Offer API
Bid-offer data.
Elexon BMRS Datasets API
Raw datasets as received from the National Grid, with associated metadata. The output in JSON format matches IRIS, and can be used interchangeably with IRIS output.
Elexon Credit Default Notice API
Credit Default Notice data.
Elexon Data Status API
The number of datapoints ingested for a dataset in a given period of time, grouped by settlement period.
Elexon Demand API
GB electricity demand, including historic.
Elexon Demand Forecast API
Current or historic demand forecasts.
Elexon Generation API
GB electricity generation output, including historic.
Elexon Generation Forecast API
Current or historic generation forecasts.
Elexon Health Check API
Provides an endpoint to check the health of the Insights API service.
Elexon Indicated Forecast API
Day-and-day-ahead indicated forecast, categorized as Indicated Generation (INDGEN), Indicated Demand (INDDEM), Imbalance (IMBALNGC) and Margin (MELNGC).
Elexon Indicative Imbalance Settlement API
Data related to the settlement process.
Elexon Legacy API
The Legacy API from Elexon — 2 operation(s) for legacy.
Elexon Load Shape API
Load shape period data and load shape totals data as calculated by the Load Shaping Service
Elexon Loss of Load Probability and De-rated Margin API
Loss of load probability and de-rated margin forecast data.
Elexon Margin Forecast API
Generating Plant Operating Margin forecast data, including historical views of data by publish time or forecast date.
Elexon Market Index API
Market Index prices filtered by time.
Elexon Non-BM STOR API
Short Term Operating Reserves (STOR) data, provided as a time series or filtered to events.
Elexon Non-BM Volumes API
Balancing services volume data, filtered by BM Unit and time range.
Elexon Reference API
Reference data which can be used to filter other API requests.
Elexon REMIT API
REMIT messages, including previous revisions.
Elexon Rolling System Demand API
The Rolling System Demand API from Elexon — 1 operation(s) for rolling system demand.
Elexon SAA Datasets API
Datasets received from the Settlement Administration Agent (SAA)
Elexon SO-SO Prices API
SO-SO Prices (SOSO) data, filtered by start time.
Elexon Surplus Forecast API
Generating Plant Operating Surplus forecast data, including historical views of data by publish time or forecast date.
Elexon System API
Transmission System data.
Elexon System forecast API
Transmission System forecasts
Elexon Temperature API
Daily average & reference temperatures.
Scroll within the panel for all 32 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Elexon Plans Pricing
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Elexon Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Elexon Finops
FINOPSSemantic Vocabularies 2
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Api Context
JSON-LDcontext Context
JSON-LDSpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Elexon API Rules
SPECTRALJSON Schema 295
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
Insights.Api.Models.Responses.Balancing.DatasetRows.BidOfferAcceptanceLevelDatasetResponse
JSON SCHEMAInsights.Api.Models.Responses.Balancing.DatasetRows.DisaggregatedBalancingServicesAdjustmentData
JSON SCHEMAInsights.Api.Models.Responses.Balancing.DisaggregatedBalancingServicesAdjustmentDetailsResponse
JSON SCHEMAInsights.Api.Models.Responses.Balancing.DisaggregatedBalancingServicesAdjustmentSummaryResponse
JSON SCHEMAInsights.Api.Models.Responses.DemandForecast.DatasetRows.DemandForecastTransmissionDayAhead
JSON SCHEMAInsights.Api.Models.Responses.DemandForecast.DatasetRows.DemandForecastTransmissionWeekly
JSON SCHEMAInsights.Api.Models.Responses.ResponseWithMetadata-1_Insights.Api.Models.Responses.Misc.SoSoPrices
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.ActualAggregatedGenerationPerTypeDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.ActualGenerationWindSolarDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.ActualTotalLoadPerBiddingZoneDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.CostsOfCongestionManagementDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.DayAheadAggregatedGenerationDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.DayAheadGenerationForWindAndSolarDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.DayAheadTotalLoadPerBiddingZoneDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.MonthAheadTotalLoadPerBiddingZoneDatasetRow
JSON SCHEMAInsights.Api.Models.Responses.Transparency.DatasetRows.WeekAheadTotalLoadPerBiddingZoneDatasetRow
JSON SCHEMAScroll within the panel for all 295 ·
Examples 20
Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.
Example request and response payloads for these APIs.
Get_Balancing_Bid Offer_200
EXAMPLEGet_Balancing_Dynamic_200
EXAMPLEGet_Balancing_Physical_200
EXAMPLEGet_Datasets_Nonbm_200
EXAMPLEGet_Datasets_Pn_200
EXAMPLEGet_Datasets_Pn_Stream_200
EXAMPLEScroll within the panel for all 20 ·
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Elexon — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
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