---
title: "Evolution of the fourteen-day demand forecast over time (NDFD, TSDFD)"
method: GET
path: "/forecast/demand/daily/evolution"
tags: ["Demand Forecast"]
---

# Evolution of the fourteen-day demand forecast over time (NDFD, TSDFD)

`GET /forecast/demand/daily/evolution`

This endpoint provides the evolution of all daily demand forecasts over time for a given forecast date.
            
Date parameter must be provided in the exact format yyyy-MM-dd.

## Query parameters

- `forecastDate` string, date, required
- `format` 'json' | 'xml' | 'csv'

## Response `200`

Data retrieved

- InsightsApiModelsResponsesResponseWithMetadata1InsightsApiModelsResponsesDemandForecastDemandForecastDaily
  - `data` InsightsApiModelsResponsesDemandForecastDemandForecastDaily[], nullable
    - `publishTime` string, date-time, nullable
    - `transmissionSystemDemand` integer
    - `nationalDemand` integer, nullable
    - `forecastDate` string, date
  - `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

---

[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)