---
title: "Replaces the homepage thumbnails in an active personalization configuration without changing its identifier or existing statistics."
method: POST
path: "/thumbnail-personalization-api/v1/universes/{universeId}/personalization/update"
tags: ["Thumbnail Personalization"]
---

# Replaces the homepage thumbnails in an active personalization configuration without changing its identifier or existing statistics.

`POST /thumbnail-personalization-api/v1/universes/{universeId}/personalization/update`

## Path parameters

- `universeId` integer, required

## Request body

- UpdateThumbnailPersonalizationRequest — The request to update a thumbnail personalization configuration.
  - `homepageThumbnailIds` string[], required — The homepage thumbnail identifiers to include in the configuration. Up to five are supported.
  - `id` string, required — The identifier of the active personalization configuration to update.

## Response `200`

Success

- string

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `500` — Server Error

## Changes

- **2026-09-03** `d9b4ae8b3380` — 6 breaking, 1 info
  - request body became required
  - the response's body type changed from `object` to `string` for status `200`
  - the response's body type changed from `object` to `string` for status `400`
  - the response's body type changed from `object` to `string` for status `401`
  - …3 more

[Change history](https://skmtc.dev/roblox/apis/roblox-api/changes/thumbnail-personalization-api/v1/universes/:universeId/personalization/update/post.md)

---

[API](https://skmtc.dev/roblox/apis/roblox-api.md) · [All operations](https://skmtc.dev/roblox/apis/roblox-api/llms.txt) · [OpenAPI document](https://skmtc.dev/roblox/apis/roblox-api/revisions/7c6787738100?raw)