---
title: "System frequency (FREQ)"
method: GET
path: "/system/frequency"
tags: ["System"]
---

# System frequency (FREQ)

`GET /system/frequency`

This endpoint allows for retrieving a collection of recent system frequency data from National Grid ESO. Results
can be filtered by a range of DateTime parameters. This endpoint is useful for ad-hoc querying frequency data.

## Query parameters

- `from` string, date-time
- `to` string, date-time
- `format` 'json' | 'xml' | 'csv'

## Response `200`

OK

- InsightsApiModelsResponsesResponseWithMetadata1InsightsApiModelsResponsesMiscSystemFrequency
  - `data` InsightsApiModelsResponsesMiscSystemFrequency[], nullable
    - `measurementTime` string, date-time
    - `frequency` number, double
  - `metadata` InsightsApiModelsMetadataApiResponseSourceMetadata
    - `datasets` string[], nullable

---

[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/revisions/d94e9edb295e/schema)