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

# System frequency (FREQ) stream

`GET /system/frequency/stream`

This endpoint allows for retrieving a stream of recent system frequency data from National Grid ESO. Results can
be filtered by a range of DateTime parameters. This endpoint has an optimised JSON payload and aimed at frequent
request for the frequency data.

## Query parameters

- `from` string, date-time
- `to` string, date-time

## Response `200`

OK

- InsightsApiModelsResponsesMiscSystemFrequency[]
  - `measurementTime` string, date-time
  - `frequency` number, double

---

[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)