---
title: "Changes to Create a message"
method: POST
path: "/api/v1/w/{wId}/assistant/conversations/{cId}/messages"
---

# Changes to Create a message

`POST /api/v1/w/{wId}/assistant/conversations/{cId}/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 10 of 130 revisions.

- **2026-10-21** `abb1c0993938`: 2 info
- **2026-10-20** `1b8b5232a3e1`: 2 info
- **2026-09-27** `acd9e7f27b34`: 4 warning, 4 info
- **2026-07-20** `89dbf1251af2`: 2 info
- **2026-07-17** `9aa33b463bf9`: 2 info
- **2026-07-17** `50e23587026b`: 4 warning
- **2026-07-15** `8bbe27ffe998`: 4 info
- **2026-06-19** `e5d6a51d91df`: 4 warning
- **2026-06-17** `885df507a66f`: 2 info
- **2026-06-17** `8848d86acfa5`: 2 info

## Changes

- **2026-10-21** `abb1c0993938`: 2 info
  - added the new optional request property `context/hostSelection`
  - added the optional property `context/hostSelection` to the response with the `200` status
- **2026-10-20** `1b8b5232a3e1`: 2 info
  - added the new optional request property `context/excludedRetrievalTags`
  - added the optional property `context/excludedRetrievalTags` to the response with the `200` status
- **2026-09-27** `acd9e7f27b34`: 4 warning, 4 info
  - added the new `low` enum value to the `modelSelection/reasoningEffort` response property for the response status `200`
  - added the new `maximal` enum value to the `modelSelection/reasoningEffort` response property for the response status `200`
  - added the new `minimal` enum value to the `modelSelection/reasoningEffort` response property for the response status `200`
  - added the new `xhigh` enum value to the `modelSelection/reasoningEffort` response property for the response status `200`
  - added the new `low` enum value to the request property `modelSelection/reasoningEffort`
  - added the new `maximal` enum value to the request property `modelSelection/reasoningEffort`
  - added the new `minimal` enum value to the request property `modelSelection/reasoningEffort`
  - added the new `xhigh` enum value to the request property `modelSelection/reasoningEffort`
- **2026-07-20** `89dbf1251af2`: 2 info
  - added the new optional request property `context/selectedSpaceIds`
  - added the optional property `context/selectedSpaceIds` to the response with the `200` status
- **2026-07-17** `9aa33b463bf9`: 2 info
  - added the new optional request property `modelSelection`
  - added the optional property `modelSelection` to the response with the `200` status
- **2026-07-17** `50e23587026b`: 4 warning
  - removed the request property `context/selectedSpaceIds`
  - removed the request property `modelSelection`
  - removed the optional property `context/selectedSpaceIds` from the response with the `200` status
  - removed the optional property `modelSelection` from the response with the `200` status
- **2026-07-15** `8bbe27ffe998`: 4 info
  - added the new optional request property `context/selectedSpaceIds`
  - added the new optional request property `modelSelection`
  - added the optional property `context/selectedSpaceIds` to the response with the `200` status
  - added the optional property `modelSelection` to the response with the `200` status
- **2026-06-19** `e5d6a51d91df`: 4 warning
  - removed the request property `context/selectedSpaceIds`
  - removed the request property `modelSelection`
  - removed the optional property `context/selectedSpaceIds` from the response with the `200` status
  - removed the optional property `modelSelection` from the response with the `200` status
- **2026-06-17** `885df507a66f`: 2 info
  - added the new optional request property `context/selectedSpaceIds`
  - added the optional property `context/selectedSpaceIds` to the response with the `200` status
- **2026-06-17** `8848d86acfa5`: 2 info
  - added the new optional request property `modelSelection`
  - added the optional property `modelSelection` to the response with the `200` status

---

[Operation](https://skmtc.dev/dust-tt/apis/dust-api-documentation/docs/api/v1/w/:wId/assistant/conversations/:cId/messages/post.md) - [API](https://skmtc.dev/dust-tt/apis/dust-api-documentation.md) - [Page](https://skmtc.dev/dust-tt/apis/dust-api-documentation/changes/api/v1/w/:wId/assistant/conversations/:cId/messages/post)