---
title: "Activate a Custom List Version"
method: POST
path: "/custom-lists/{customListToken}/activate/{major_version}"
tags: ["Custom Lists"]
---

# Activate a Custom List Version

`POST /custom-lists/{customListToken}/activate/{major_version}`

Activate a specific major version of a custom list. The actual list version used in a realtime evaluation will be the latest minor version for the major version.

## Response `200`

Successfully activated Custom List Major Version

- object
  - `custom_list_token` string
  - `active_major_version` number

## Other responses

- `400` — Bad request - Invalid Custom List Token or Version
- `403` — Forbidden - Insufficient Permissions
- `404` — Custom List or Version Not Found

---

[API](https://skmtc.dev/alloy/apis/alloy-api.md) · [All operations](https://skmtc.dev/alloy/apis/alloy-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/alloy/alloy-api/revisions/405799de4d2a/schema)