---
title: "Get presigned URLs for multipart upload parts"
method: POST
path: "/vault/{id}/multipart/part-urls"
tags: ["Vaults"]
---

# Get presigned URLs for multipart upload parts

`POST /vault/{id}/multipart/part-urls`

Generate presigned URLs for individual multipart upload parts (live).

## Path parameters

- `id` string, required

## Request body

- object
  - `objectId` string, required — Vault object ID associated with the multipart upload
  - `uploadId` string, required — Multipart upload ID returned when the upload was initialized
  - `parts` object[], required — Multipart parts that need presigned upload URLs
    - `partNumber` integer, required — 1-based multipart part number
    - `sizeBytes` integer, required — Part size in bytes (min 5MB except final part, max 5GB).

## Response `200`

Multipart part URLs generated successfully

- object
  - `urls` object[]
    - `partNumber` integer
    - `url` string

## Other responses

- `400` — Multipart upload request is invalid or does not match stored upload metadata
- `401` — Invalid API key
- `403` — API key does not have write access to vault service
- `404` — Vault or vault object not found

---

[API](https://skmtc.net/casemark/apis/case-dev-api.md) · [All operations](https://skmtc.net/casemark/apis/case-dev-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/casemark/case-dev-api/versions/5b7e64e6d6f9/schema)