---
title: "Upload file chunk"
method: PATCH
path: "/upload/{FileId}"
tags: ["Upload"]
---

# Upload file chunk

`PATCH /upload/{FileId}`

Upload a chunk of file data to an existing session.

## Headers

- `Upload-Offset` integer, required
- `Content-Type` string, required
- `Tus-Resumable` string, required

## Response `204`

Chunk uploaded successfully. Check Upload-Offset header for next offset.

## Other responses

- `400` — Bad request or invalid offset
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Upload session not found or expired
- `409` — Upload-Offset conflict - does not match current offset

---

[API](https://skmtc.dev/bimtrackapp/apis/newforma-konekt-document-control-api.md) · [All operations](https://skmtc.dev/bimtrackapp/apis/newforma-konekt-document-control-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/bimtrackapp/newforma-konekt-document-control-api/revisions/4671d430ce39/schema)