---
title: "Upload a part of an ongoing multipart upload"
method: PUT
path: "/worker/multipart/{key}"
tags: ["worker"]
---

# Upload a part of an ongoing multipart upload

`PUT /worker/multipart/{key}`

Upload a single part of an ongoing multipart upload. Parts can be uploaded in parallel and then combined afterwards.

## Path parameters

- `key` string, required

## Query parameters

- `bucket` string, required — The name of the bucket.
- `uploadid` string, required — A unique identifier for a multipart upload
- `partnumber` integer, required — The number of this part
- `minshards` integer — The number of data shards a piece of an object gets erasure-coded into
- `totalshards` integer — The number of total data shards a piece of an object gets erasure-coded into
- `encryptionoffset` integer

## Response `200`

Successfully uploaded part

## Other responses

- `400` — Malformed request
- `404` — Bucket or upload weren't found
- `503` — Consensus isn't synced

---

[API](https://skmtc.net/siafoundation/apis/renterd-api.md) · [All operations](https://skmtc.net/siafoundation/apis/renterd-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/siafoundation/renterd-api/revisions/184a3d5207da/schema)