---
title: "Upload a part of a multipart upload"
method: PUT
path: "/bus/multipart/part"
tags: ["bus"]
---

# Upload a part of a multipart upload

`PUT /bus/multipart/part`

Adds a part to an ongoing multipart upload.

## Request body

- object
  - `bucket` string — The name of the bucket.
  - `eTag` string — An ETag representing a resource
  - `key` string
  - `uploadID` string, byte — A 32-byte unique identifier represented as a hex string.
  - `partNumber` integer — The number of this part
  - `slices` SlabSlice[]
    - `slab` Slab — A slab of data to migrate
      - `health` number, float
      - `encryptionKey` string — The encryption key used to encrypt the slab's shards
      - `minShards` integer — The number of data shards the slab is split into
    - `offset` integer
    - `limit` integer

## Response `200`

Successfully uploaded part

## Other responses

- `400` — Invalid request parameters
- `500` — Internal server error

---

[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/versions/184a3d5207da/schema)