---
title: "Changes to A presigned PUT for one file. The type and size are checked here so the composer can say\nno before uploading; they are checked again against the stored bytes at send time, since\na presigned PUT can't enforce either."
method: POST
path: "/message-attachments/upload-url"
---

# Changes to A presigned PUT for one file. The type and size are checked here so the composer can say
no before uploading; they are checked again against the stored bytes at send time, since
a presigned PUT can't enforce either.

`POST /message-attachments/upload-url`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 14 revisions.

- **2026-10-28** `099cf36186e0`: 1 info

## Changes

- **2026-10-28** `099cf36186e0`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/clinicos/apis/pawthosx-business-api-v1/docs/message-attachments/upload-url/post.md) - [API](https://skmtc.dev/clinicos/apis/pawthosx-business-api-v1.md) - [Page](https://skmtc.dev/clinicos/apis/pawthosx-business-api-v1/changes/message-attachments/upload-url/post)