---
title: "Changes to Send async message"
method: POST
path: "/session/{sessionID}/prompt_async"
---

# Changes to Send async message

`POST /session/{sessionID}/prompt_async`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 4 of 69 revisions.

- **2026-02-14** `9df3a7d5f839`: 1 warning
- **2026-02-12** `7eb1c31fb938`: 1 info
- **2026-01-15** `840036baecaf`: 1 info
- **2026-01-04** `58e0e517471e`: 1 info

## Changes

- **2026-02-14** `9df3a7d5f839`: 1 warning
  - removed the request property `format`
- **2026-02-12** `7eb1c31fb938`: 1 info
  - added the new optional request property `format`
- **2026-01-15** `840036baecaf`: 1 info
  - added the new optional request property `parts/items/anyOf[#/components/schemas/SubtaskPartInput]/model`
- **2026-01-04** `58e0e517471e`: 1 info
  - added `#/components/schemas/ResourceSource` to the `parts/items/anyOf[#/components/schemas/FilePartInput]/source` request property `anyOf` list

---

[Operation](https://skmtc.dev/martian-engineering/apis/voltcode/docs/session/:sessionID/prompt_async/post.md) - [API](https://skmtc.dev/martian-engineering/apis/voltcode.md) - [Page](https://skmtc.dev/martian-engineering/apis/voltcode/changes/session/:sessionID/prompt_async/post)