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v1

latestOpenAPI 3.0.0BSD License2026-07-24228233924.5 KB
Elexon

Day and Day-Ahead Transmission System Demand Forecast

This endpoint provides the Transmission System forecast. Data is received from 9am on current day from NGESO and will show values for the day ahead. Expressed as an average MW value for each Settlement period. The Transmission System Demand Forecast is based on historically metered generation output for Great Britain. This value INCLUDES Interconnector flows and demand from station transformers and pumped storage units.

get/gb/elexon/forecasts/tsdf

Query parameters

publish_date_fromstring date-time required

Start date time for the request, referring to when the forecast was published. Ex: yyyy-mm-ddThh:mm:ss

publish_date_tostring date-time required

End date time for the request, referring to when the forecast was published. Ex: yyyy-mm-ddThh:mm:ss

limitinteger

Number of results to return per page.

offsetinteger

The initial index from which to return the results.

timezone'UTC' | 'Europe/Berlin' | 'Europe/London' | 'America/New_York' | 'America/Chicago' | 'America/Los_Angeles'

The timezone for the query and returned data. If not specified, the default timezone is shown in the information table.

Response

Success

countinteger required
nextstring uri nullable
previousstring uri nullable