---
title: "Changes to Add Watchlist Item"
method: POST
path: "/v1/watchlists/{watchlist_id}/items"
---

# Changes to Add Watchlist Item

`POST /v1/watchlists/{watchlist_id}/items`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 62 revisions.

- **2026-10-16** `1bd9eddeffc8`: 3 breaking
- **2026-06-08** `920881a98f6c`: 1 breaking, 1 info

## Changes

- **2026-10-16** `1bd9eddeffc8`: 3 breaking
  - the `instrument_id` request property's minLength was increased from `0` to `1`
  - removed `subschema #1, subschema #2` from the `instrument_id` request property `oneOf` list
  - the `instrument_id` request property type changed from no type to `string`
- **2026-06-08** `920881a98f6c`: 1 breaking, 1 info
  - removed `subschema #1, subschema #2` from the `instrument_id` request property `oneOf` list
  - added `subschema #1, subschema #2` to the `instrument_id` request property `oneOf` list

---

[Operation](https://skmtc.dev/clear-street/apis/clear-street-trading-api/docs/v1/watchlists/:watchlist_id/items/post.md) - [API](https://skmtc.dev/clear-street/apis/clear-street-trading-api.md) - [Page](https://skmtc.dev/clear-street/apis/clear-street-trading-api/changes/v1/watchlists/:watchlist_id/items/post)