---
title: "Upload Aqueduct Thumbnail"
method: PUT
path: "/aqueduct/thumbnails/{filename}"
---

# Upload Aqueduct Thumbnail

`PUT /aqueduct/thumbnails/{filename}`

Snapshot/project preview thumbnails (separate namespace from /assets/).

The 256px image is content-addressed by its own sha. The co-located 64px
"-64" variant is keyed off the 256's sha (so the frontend derives its URL)
and therefore cannot self-verify; it is validated as a small PNG instead.

## Path parameters

- `filename` string, required

## Response `200`

Successful Response

- AssetUploadResponse
  - `url` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/iliad/apis/fastapi.md) · [All operations](https://skmtc.dev/iliad/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/iliad/fastapi/revisions/c1701119b330/schema)