---
title: "Get Unit Supplementary Data"
method: GET
path: "/datasets/{dataset_id}/unit-data/{identifier}"
---

# Get Unit Supplementary Data

`GET /datasets/{dataset_id}/unit-data/{identifier}`

## Request

- The document declares no server URL.
- Auth: none declared

Retrieve supplementary data for a particular unit given the dataset id and identifier, return 404 if no data is returned.

Parameters:
dataset_id (str): The unique id of the dataset being queried.
identifier (str): The identifier of the particular unit on the data being queried.

## Path parameters

- `dataset_id` string, required
- `identifier` string, required

## Response `200`

Successful Response

- UnitDataset
  - `dataset_id` string, required
  - `survey_id` string, required
  - `period_id` string, required
  - `form_types` string[], required
  - `data` unknown, required

## Other responses

- `400`: Bad Request
- `404`: Not Found
- `500`: Internal Server Error

## Changes

> 32 revisions in range; 2 not diffed.

- **2026-07-01** `9a87e51baf13`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/office-of-national-statistics/apis/supplementary-data-service/changes/datasets/:dataset_id/unit-data/:identifier/get.md)

---

[API](https://skmtc.dev/office-of-national-statistics/apis/supplementary-data-service.md) - [All operations](https://skmtc.dev/office-of-national-statistics/apis/supplementary-data-service/llms.txt) - [OpenAPI document](https://skmtc.dev/office-of-national-statistics/apis/supplementary-data-service/revisions/9a87e51baf13?raw)