Great Britain Generation by Fuel for One Half-Hour Settlement Period (Elexon BMRS FUELINST)

elexon/fuel-mix-half-hour

Great Britain's electricity generation by fuel category for one half-hour settlement period of one day, from the Elexon Balancing Mechanism Reporting Service FUELINST dataset: the five-minute average output in megawatts of each category (gas, coal, nuclear, wind, biomass, hydro, pumped storage, oil, other, each interconnector) for the period. Needs a settlement date and a period from 1 to 50. A day with no data (the future) returns an 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.

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

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "elexon/fuel-mix-half-hour" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "elexon/fuel-mix-half-hour" })

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

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

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 25, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "settlement_date",
    "settlement_period"
  ],
  "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."
    },
    "settlement_period": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Half-hour settlement period of that day, 1 to 50: period 1 is 00:00 to 00:30 UK local time, period 18 is 08:30 to 09:00; a day has 48 periods (46 or 50 when the clocks change)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "fuelType",
          "generation",
          "startTime"
        ],
        "properties": {
          "dataset": {
            "type": "string",
            "description": "The dataset code, FUELINST."
          },
          "fuelType": {
            "type": "string",
            "description": "The generation category, for example CCGT, WIND, NUCLEAR, INTFR."
          },
          "startTime": {
            "type": "string",
            "description": "Start of the five-minute interval the average covers, UTC ISO 8601."
          },
          "generation": {
            "type": "number",
            "description": "Average output over the five minutes, megawatts. Interconnector categories are negative when exporting."
          },
          "publishTime": {
            "type": "string",
            "description": "When the reading was published, UTC ISO 8601."
          },
          "settlementDate": {
            "type": "string",
            "description": "Settlement date, YYYY-MM-DD."
          },
          "settlementPeriod": {
            "type": "integer",
            "description": "Settlement period, 1 to 50."
          }
        },
        "additionalProperties": true
      },
      "description": "One row per fuel category per five-minute interval of the period, normally 6 intervals x 20 categories = 120 rows. Empty for a period with no data."
    }
  },
  "additionalProperties": true
}