---
title: "Changes to Register an uploaded attachment after R2 verification"
method: POST
path: "/api/preview/attachments/confirm"
---

# Changes to Register an uploaded attachment after R2 verification

`POST /api/preview/attachments/confirm`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 12 revisions.

- **2026-10-09** `c7729725d527`: 2 info
- **2026-09-30** `6a95af57f0f6`: 6 info
- **2026-08-29** `9ca3e15b9d44`: 1 info

## Changes

- **2026-10-09** `c7729725d527`: 2 info
  - added the optional property `capsule_updated_at` to the response with the `201` status
  - added the optional property `embed_markdown` to the response with the `201` status
- **2026-09-30** `6a95af57f0f6`: 6 info
  - added the optional property `height` to the response with the `201` status
  - added the optional property `optimization` to the response with the `201` status
  - added the optional property `rotation_base_key` to the response with the `201` status
  - added the optional property `rotation_base_size` to the response with the `201` status
  - added the optional property `rotation_degrees` to the response with the `201` status
  - added the optional property `width` to the response with the `201` status
- **2026-08-29** `9ca3e15b9d44`: 1 info
  - added the optional property `retention` to the response with the `201` status

---

[Operation](https://skmtc.dev/symbol/apis/symbol-api/docs/api/preview/attachments/confirm/post.md) - [API](https://skmtc.dev/symbol/apis/symbol-api.md) - [Page](https://skmtc.dev/symbol/apis/symbol-api/changes/api/preview/attachments/confirm/post)