---
title: "Unassign an annotation configuration from a project"
method: DELETE
path: "/v1/projects/{project_identifier}/annotation_configs/{config_identifier}"
tags: ["annotation_configs"]
---

# Unassign an annotation configuration from a project

`DELETE /v1/projects/{project_identifier}/annotation_configs/{config_identifier}`

Unassign an annotation configuration from a project. This operation is idempotent: unassigning a config that is not currently assigned is a no-op. The underlying annotation config is not deleted. Both the project and the config are identified by either ID or name.

## Path parameters

- `project_identifier` string, required — The project identifier: either project ID or project name.
- `config_identifier` string, required — The annotation configuration identifier: either ID or name.

## Response `204`

No content returned on successful unassignment

## Other responses

- `403` — Forbidden
- `404` — Not Found
- `422` — Unprocessable Entity

## Changes

- **2026-07-03** `b38d34684bf7` — 1 info
  - endpoint added
- **2026-04-29** `c81391216eb5` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/arize-ai/apis/arize-phoenix-rest-api/changes/v1/projects/:project_identifier/annotation_configs/:config_identifier/delete.md)

---

[API](https://skmtc.dev/arize-ai/apis/arize-phoenix-rest-api.md) · [All operations](https://skmtc.dev/arize-ai/apis/arize-phoenix-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/arize-ai/arize-phoenix-rest-api/revisions/c2502537476f/schema)