---
title: "Initiate a resumable upload session"
method: POST
path: "/missions/{missionId}/files/{fileId}/upload-session"
---

# Initiate a resumable upload session

`POST /missions/{missionId}/files/{fileId}/upload-session`

Returns S3 presigned URLs for multipart upload.

## Path parameters

- `missionId` string, required
- `fileId` string, required

## Response `200`

Upload session details.

- UploadSession
  - `upload_id` string — S3 Multipart Upload ID.
  - `parts` object[]
    - `part_number` integer
    - `presigned_url` string

---

[API](https://skmtc.dev/google/apis/robot-fleet-data-management-api.md) · [All operations](https://skmtc.dev/google/apis/robot-fleet-data-management-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/google/robot-fleet-data-management-api/revisions/a330f96c56b5/schema)