---
title: "Changes to Create upload session"
method: POST
path: "/files/upload_sessions"
---

# Changes to Create upload session

`POST /files/upload_sessions`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-11-03** `c4d5303fa5c3`: 5 warning, 1 info

## Changes

- **2026-11-03** `c4d5303fa5c3`: 5 warning, 1 info
  - added the new `unprocessable_entity` enum value to the `code` response property for the response status `400`
  - added the new `unprocessable_entity` enum value to the `code` response property for the response status `403`
  - added the new `unprocessable_entity` enum value to the `code` response property for the response status `404`
  - added the new `unprocessable_entity` enum value to the `code` response property for the response status `409`
  - added the new `unprocessable_entity` enum value to the `code` response property for the response status `default`
  - added the optional property `session_endpoints/allOf[subschema #1: Session endpoints]/plan` to the response with the `201` status

---

[Operation](https://skmtc.dev/box/apis/platform-api/docs/files/upload_sessions/post.md) - [API](https://skmtc.dev/box/apis/platform-api.md) - [Page](https://skmtc.dev/box/apis/platform-api/changes/files/upload_sessions/post)