---
title: "Inertia"
method: GET
path: "/gb/national-grid/system/inertia"
tags: ["NESO"]
---

# Inertia

`GET /gb/national-grid/system/inertia`

## Request

- Base URL: `https://api.modoenergy.com/pub/v1`
- URL: `https://api.modoenergy.com/pub/v1/gb/national-grid/system/inertia`
- Auth: one of:
  - API key in header `X-Token`
  - none

This dataset contains an estimate of the outturn inertia and market provided inertia for Great Britain Transmission System.

## Query parameters

- `date_from` string, date, required
- `date_to` string, date, required
- `limit` integer
- `offset` integer

## Response `200`

Success

- object
  - `count` integer, required
  - `next` string, uri, nullable
  - `previous` string, uri, nullable
  - `results` SystemInertia[], required
    - `settlementDate` string, date, required
    - `settlementPeriod` integer, nullable
    - `outturnInertia` integer, nullable
    - `marketProvidedInertia` integer, nullable

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `429`: Too Many Requests

---

[API](https://skmtc.dev/modoenergy/apis/modo-energy-api.md) - [All operations](https://skmtc.dev/modoenergy/apis/modo-energy-api/llms.txt) - [OpenAPI document](https://skmtc.dev/modoenergy/apis/modo-energy-api/revisions/7d9d1bd6ee06?raw)