---
title: "Changes to Send Message"
method: POST
path: "/api/v1/imessage/messages"
---

# Changes to Send Message

`POST /api/v1/imessage/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 39 revisions.

- **2026-10-04** `5cbaa42f14f7`: 5 info
- **2026-09-30** `8583fbe88b90`: 1 info

## Changes

- **2026-10-04** `5cbaa42f14f7`: 5 info
  - added the new optional request property `plain_reply_fallback`
  - added the new optional request property `reply_to_message_id`
  - added the optional property `anyOf[subschema #1: SendIMessageResponse]/message/reply_to_message_id` to the response with the `201` status
  - added the optional property `anyOf[subschema #1: SendIMessageResponse]/message/thread_id` to the response with the `201` status
  - added the optional property `anyOf[subschema #1: SendIMessageResponse]/message/thread_root_message_id` to the response with the `201` status
- **2026-09-30** `8583fbe88b90`: 1 info
  - added the new optional `header` request parameter `Prefer`

---

[Operation](https://skmtc.dev/inkbox/apis/inkbox-api/docs/api/v1/imessage/messages/post.md) - [API](https://skmtc.dev/inkbox/apis/inkbox-api.md) - [Page](https://skmtc.dev/inkbox/apis/inkbox-api/changes/api/v1/imessage/messages/post)