---
title: "Initial Transmission System Demand outturn (ITSDO)"
method: GET
path: "/datasets/ITSDO"
tags: ["BMRS Datasets"]
---

# Initial Transmission System Demand outturn (ITSDO)

`GET /datasets/ITSDO`

The endpoint provides data showing the initial Transmission System Demand outturn.
Data is updated at 15 min intervals containing the initial demand expressed in MW.
            
Specific publish time filters may be supplied, otherwise this will retrieve the latest published forecast.

## Query parameters

- `publishDateTimeFrom` string, date-time
- `publishDateTimeTo` string, date-time
- `format` 'json' | 'xml' | 'csv'

## Response `200`

Data retrieved

- InsightsApiModelsResponsesDatasetResponse1InsightsApiModelsResponsesDemandOutturnDatasetRowsDemandOutturnTransmission
  - `data` InsightsApiModelsResponsesDemandOutturnDatasetRowsDemandOutturnTransmission[], nullable
    - `dataset` string, nullable
    - `publishTime` string, date-time
    - `startTime` string, date-time
    - `settlementDate` string, date
    - `settlementPeriod` integer
    - `demand` integer, nullable

## Other responses

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

---

[API](https://skmtc.net/elexon/apis/bmrs-insights.md) · [All operations](https://skmtc.net/elexon/apis/bmrs-insights/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/elexon/bmrs-insights/versions/d94e9edb295e/schema)