---
title: "List the measurement IDs the current user is watching"
method: GET
path: "/projects/{project_id}/lab/watched"
tags: ["Lab"]
---

# List the measurement IDs the current user is watching

`GET /projects/{project_id}/lab/watched`

## Request

- Base URL: `https://api.ionworks.com`
- URL: `https://api.ionworks.com/projects/{project_id}/lab/watched`
- Auth: none declared

Return the IDs of measurements the current user is watching.

A flat list of IDs for membership testing on the client. Includes watches on
measurements that may since have finished; the Lab wall intersects them with
its live channels, so finished watches simply do not surface.

## Path parameters

- `project_id` string, uuid, required

## Response `200`

Successful Response

- WatchedMeasurementIds: The set of measurement IDs the requesting user is currently watching. Returned as a flat list of IDs (not full rows) because callers only need to test membership — e.g. to mark channels as watched on the Lab wall.
  - `measurement_ids` string[]: IDs of live measurements the user is watching

## Other responses

- `422`: Validation Error

## Changes

- **2026-09-30** `ea3d377fec1a`: 1 breaking
  - for the `path` request parameter `project_id`, the format changed from no format to `uuid`

[Operation history](https://skmtc.dev/ionworks/apis/ionworks-api/changes/projects/:project_id/lab/watched/get.md)

---

[API](https://skmtc.dev/ionworks/apis/ionworks-api.md) - [All operations](https://skmtc.dev/ionworks/apis/ionworks-api/llms.txt) - [OpenAPI document](https://skmtc.dev/ionworks/apis/ionworks-api/revisions/abebbbc5f60a?raw)