---
title: "Changes to Create annotation"
method: POST
path: "/api/tasks/{id}/annotations/"
---

# Changes to Create annotation

`POST /api/tasks/{id}/annotations/`

> Every recorded change to this endpoint, newest first.
> 97 revisions in range; 1 not diffed.

## Timeline

Changed in 2 of 97 revisions.

- **2026-08-07** `e1ba2ecdbabb` — 1 breaking, 14 info
- **2026-07-08** `04ff286141b5` — 2 info

## Changes

- **2026-08-07** `e1ba2ecdbabb` — 1 breaking, 14 info
  - the `lead_time` request property type/format changed from `number`/`` to `number`/`double`
  - added the new optional request property `bulk_created`
  - added the new optional request property `draft_created_at`
  - added the new optional request property `import_id`
  - added the new optional request property `last_action`
  - added the new optional request property `last_created_by`
  - added the new optional request property `parent_annotation`
  - added the new optional request property `parent_prediction`
  - added the new optional request property `unique_id`
  - added the media type `application/x-www-form-urlencoded` to the request body
  - added the media type `multipart/form-data` to the request body
  - the request property `lead_time` became nullable
  - the request property `project` became nullable
  - the request property `task` became nullable
  - the request property `updated_by` became nullable
- **2026-07-08** `04ff286141b5` — 2 info
  - added `#/components/schemas/AnnotationHistoryActionEnum` to the `last_action` response property `allOf` list for the response status `201`
  - removed `#/components/schemas/LastActionEnum` from the `last_action` response property `allOf` list for the response status `201`

---

[Operation](https://skmtc.dev/humansignal/apis/label-studio-api/docs/api/tasks/:id/annotations/post.md) · [API](https://skmtc.dev/humansignal/apis/label-studio-api.md) · [Page](https://skmtc.dev/humansignal/apis/label-studio-api/changes/api/tasks/:id/annotations/post)