---
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`

## Request

- Base URL: `https://apis.roblox.com`
- URL: `https://apis.roblox.com/thumbnail-personalization-api/v1/universes/{universeId}/personalization/update`
- Auth: one of:
  - API key in cookie `.ROBLOSECURITY`
  - API key in header `x-api-key`

## 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

- **2026-10-14** `5dcfa33df56a`: 1 info
  - the endpoint scheme security `roblox-oauth2` was removed from the API
- **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

[Operation 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/bcfdc20689cd?raw)