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Great Britain Electricity Demand Outturn by Half Hour for One Day (Elexon BMRS INDO and ITSDO)

elexon/demand-outturn

Half-hourly electricity demand outturn for Great Britain for one settlement day, from the Elexon Balancing Mechanism Reporting Service: Initial National Demand Outturn (INDO) and Initial Transmission System Demand Outturn (ITSDO) in megawatts for each of the day's 48 settlement periods (46 or 50 when the clocks change). Needs a settlement date; a day not yet published returns a shorter or empty list. Contains BMRS data © Elexon Limited copyright and database right 2026. Served by Eden Engine; not an official Elexon product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

Elexon Limited

Contains BMRS data © Elexon Limited copyright and database right 2026. Licence: https://www.elexon.co.uk/bsc/data/balancing-mechanism-reporting-agent/copyright-licence-bmrs-data/ Served by Eden Engine; not an official Elexon product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

Install itCreate an account
agent
// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "elexon/demand-outturn" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "elexon/demand-outturn" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "elexon/demand-outturn", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "elexon/demand-outturn", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

ChargePrice
Per call
$0.0026
Updated
Oct 25, 2026

Input and output schemas

Input schema
input_schema.json
{
  "type": "object",
  "required": [
    "settlement_date"
  ],
  "properties": {
    "settlement_date": {
      "type": "string",
      "pattern": "^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
      "description": "Settlement date in UK local time, YYYY-MM-DD, for example 2026-10-23."
    }
  },
  "additionalProperties": false
}
Output schema
output_schema.json
{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "settlementPeriod",
          "initialDemandOutturn"
        ],
        "properties": {
          "startTime": {
            "type": "string",
            "description": "Start of the half hour, UTC ISO 8601."
          },
          "publishTime": {
            "type": "string",
            "description": "When the half hour was published, UTC ISO 8601."
          },
          "settlementDate": {
            "type": "string",
            "description": "Settlement date, YYYY-MM-DD."
          },
          "settlementPeriod": {
            "type": "integer",
            "description": "Settlement period, 1 to 50."
          },
          "initialDemandOutturn": {
            "type": "number",
            "description": "Initial National Demand Outturn (INDO), megawatts: half-hour average demand metered by the transmission company, including transmission losses but not station transformer load, pumped storage demand or interconnector demand."
          },
          "initialTransmissionSystemDemandOutturn": {
            "type": "number",
            "description": "Initial Transmission System Demand Outturn (ITSDO), megawatts: as INDO plus station transformer load, pumped storage demand and interconnector demand."
          }
        },
        "additionalProperties": true
      },
      "description": "One row per settlement period published so far for the day, up to 48. Empty when none is published."
    },
    "metadata": {
      "type": "object",
      "properties": {
        "datasets": {
          "type": "array",
          "items": {
            "type": "string",
            "description": "A dataset code."
          },
          "description": "The dataset codes in the answer, INDO and ITSDO."
        }
      },
      "description": "Which datasets the rows carry.",
      "additionalProperties": true
    }
  },
  "additionalProperties": true
}