---
title: "Add/remove annotation labels"
method: POST
path: "/api/v1/labels/apply"
tags: ["Label"]
---

# Add/remove annotation labels

`POST /api/v1/labels/apply`

Add/Remove labels on annotations.

## Request body

- ApplyRequest
  - `operations` object, required — Operations to perform on labels
    - `add` string[] — List of label URLs to add to annotations
    - `remove` string[] — List of label URLs to remove from annotations
  - `objects` object, required — Objects to apply operations to
    - `annotations` string[] — List of annotation URLs to apply operations to

## Response `204`

No Content

## Other responses

- `400` — Invalid input data.
- `401` — The username/password is invalid or token is invalid (e.g. expired).
- `403` — Insufficient permission, missing authentication, invalid CSRF token and similar issue.
- `404` — The specified resource was not found.
- `409` — Conflict
- `413` — Payload too large (especially for files uploaded).
- `429` — Request rate is too high, wait before sending more requests. See [Rate Limiting](/guides/overview#rate-limiting) for more details.
- `500` — Server failure while processing the request.
- `502` — Invalid response from the upstream server.
- `503` — We're temporarily offline for maintenance. Please try again later.
- `504` — Upstream server could not complete the request in time.

---

[API](https://skmtc.dev/rossum/apis/rossum-api.md) · [All operations](https://skmtc.dev/rossum/apis/rossum-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/rossum/rossum-api/revisions/f1b5a910991d/schema)