---
title: "Indicative peak demand per day (S0142, ITSDO, FUELHH)"
method: GET
path: "/demand/peak/indicative"
tags: ["Demand"]
---

# Indicative peak demand per day (S0142, ITSDO, FUELHH)

`GET /demand/peak/indicative`

Indicative demand peaks using operational metering data are daily maxima values determined from
ITSDO and FUELHH data used to determine and visualise Triad.
            
Indicative demand peaks using settlement metering data are daily maxima values determined from
metered volume data from the S0142_bpi file. These peaks are not used for Triad visualisation as
they are always calculated based on the latest run type. Triads for settlement data
remain static after the National Grid report posted at the beginning of April after the Triad season has ended. 
            
If no filters are supplied, results default to the latest or current Triad season.
To specify a custom filter, you can supplier EITHER a Triad season start year, OR a date range, but not both.
If a Triad Season Start year is supplied, data for the Triad season beginning on 1 November
of the specified year will be returned.
If a date range is supplied, data will be returned for settlement dates within the date range inclusively.
            
Date parameters must be provided in the exact format yyyy-MM-dd.

## Query parameters

- `data` 'operational' | 'settlement', required
- `triadSeasonStartYear` integer
- `from` string, date
- `to` string, date
- `format` 'json' | 'xml' | 'csv'

## Response `200`

Data retrieved

- InsightsApiModelsResponsesResponseWithMetadata1InsightsApiModelsResponsesDemandOutturnIndicativeDemandPeak
  - `data` InsightsApiModelsResponsesDemandOutturnIndicativeDemandPeak[], nullable
    - `settlementDate` string, date
    - `settlementPeriod` integer
    - `halfHourEndTime` string, date-time
    - `demand` number, double
    - `settlementRunType` string, nullable
  - `metadata` InsightsApiModelsMetadataApiResponseSourceMetadata
    - `datasets` string[], nullable

## Other responses

- `400` — Error with query parameters - see response for details
- `429` — Too many requests
- `500` — Server error - please try again later

---

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