---
title: "Bulk update labels"
method: POST
path: "/api/labels/bulk"
tags: ["Labels"]
---

# Bulk update labels

`POST /api/labels/bulk`

If you want to update the labels in saved annotations, use this endpoint.

## Request body

- LabelBulkUpdateRequest
  - `new_label` unknown, required
  - `old_label` unknown, required
  - `project` integer

## Response `200`

- LabelBulkUpdateResponse
  - `annotations_updated` integer, required

## Changes

> 98 revisions in range; 1 not diffed.

- **2026-07-13** `3be0d8850ae0` — 1 breaking, 1 info
  - added required request body
  - added the media type `application/json` for the response with the status `200`

[Change history](https://skmtc.dev/humansignal/apis/label-studio-api/changes/api/labels/bulk/post.md)

---

[API](https://skmtc.dev/humansignal/apis/label-studio-api.md) · [All operations](https://skmtc.dev/humansignal/apis/label-studio-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/humansignal/label-studio-api/revisions/cbc94e6444bb/schema)