---
title: "Updates collection thumbnail."
method: PUT
path: "/collections/{collection_id}/thumbnail"
tags: ["Collections"]
---

# Updates collection thumbnail.

`PUT /collections/{collection_id}/thumbnail`

## Request

- Base URL: `https://h2ogpte.genai.h2o.ai/api/v1`
- URL: `https://h2ogpte.genai.h2o.ai/api/v1/collections/{collection_id}/thumbnail`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/h2o/apis/h2ogpte-rest-api/docs/collections/:collection_id/thumbnail/put.ts> (a function with typed inputs; its response is checked against the schema)

Uploads a new thumbnail image for the collection.

## Path parameters

- `collection_id` string, required

## Query parameters

- `timeout` number, double

## Request body `multipart/form-data`

- object
  - `file` string, binary

## Response `204`

Successful operation

## Other responses

- `400`: Bad request
- `401`: Unauthorized - Invalid or missing API key
- `413`: Request entity is too large
- `415`: Unsupported media type
- `default`: Unexpected error

---

[API](https://skmtc.dev/h2o/apis/h2ogpte-rest-api.md) - [All operations](https://skmtc.dev/h2o/apis/h2ogpte-rest-api/llms.txt) - [OpenAPI document](https://skmtc.dev/h2o/apis/h2ogpte-rest-api/revisions/a82a117320f4?raw)