---
title: "Changes to Create a conversation message"
method: POST
path: "/conversations/{conversationId}/messages"
---

# Changes to Create a conversation message

`POST /conversations/{conversationId}/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 30 of 49 revisions.

- **2026-11-03** `d852746d81c2`: 1 info
- **2026-10-30** `a9240e90401f`: 1 breaking, 1 info
- **2026-10-27** `6118d32e981b`: 1 info
- **2026-10-26** `32c8881d7c01`: 2 info
- **2026-10-23** `fd1c901b12fc`: 2 info
- **2026-10-21** `b00784f6b144`: 1 breaking, 1 info
- **2026-10-18** `aaceae49c08d`: 12 info
- **2026-10-17** `140fba308073`: 1 info
- **2026-10-15** `b04239ad46c5`: 2 breaking, 2 info
- **2026-10-13** `a1b7544d3bf4`: 3 info
- **2026-10-12** `d386b4341e6a`: 1 breaking, 1 info
- **2026-10-10** `91b5b6814409`: 1 breaking, 1 info
- **2026-10-08** `5ad9173810c0`: 1 breaking, 1 info
- **2026-10-08** `85b4b3888d0d`: 2 breaking, 2 info
- **2026-10-05** `9db8a5c7afb8`: 1 breaking, 1 info
- **2026-10-03** `c5d9fe685b8f`: 1 breaking, 2 info
- **2026-10-01** `8b5b17687cd0`: 2 info
- **2026-09-26** `3fd9240dfb9d`: 2 info
- **2026-09-24** `03367d93b6be`: 1 breaking, 3 info
- **2026-09-23** `a72665a2748f`: 3 info
- **2026-09-22** `0e052a8b881e`: 2 info
- **2026-09-15** `7f2488f4db4c`: 1 breaking, 1 info
- **2026-09-14** `4777a36ab1a9`: 2 info
- **2026-09-12** `e4b95335db08`: 1 info
- **2026-09-11** `be7b87a3cbbc`: 1 info
- **2026-09-10** `ff98b92174fc`: 1 breaking, 1 info
- **2026-09-09** `5a21b8f44a70`: 1 breaking, 1 info
- **2026-09-07** `0b0da59eb0d1`: 1 breaking, 2 warning, 1 info
- **2026-09-07** `48506611d15b`: 1 info
- **2026-09-04** `2da0b5c6e637`: 1 info

## Changes

- **2026-11-03** `d852746d81c2`: 1 info
  - added the optional property `data/replied_to` to the response with the `200` status
- **2026-10-30** `a9240e90401f`: 1 breaking, 1 info
  - removed `subschema #5, subschema #11, subschema #12, subschema #16` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #5, subschema #11, subschema #12, subschema #16` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-27** `6118d32e981b`: 1 info
  - added the optional property `data/thread_root_id` to the response with the `200` status
- **2026-10-26** `32c8881d7c01`: 2 info
  - added the optional property `data/reactions/items/membership_ids` to the response with the `200` status
  - added the optional property `data/reactions/items/reacted_by_me` to the response with the `200` status
- **2026-10-23** `fd1c901b12fc`: 2 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #13]/multiline`
  - the `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #13]/value` request property's maxLength was increased from `2000` to `4096`
- **2026-10-21** `b00784f6b144`: 1 breaking, 1 info
  - removed `subschema #4, subschema #5, subschema #18` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #4, subschema #5, subschema #18` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-18** `aaceae49c08d`: 12 info
  - added the optional property `request_id` to the response with the `400` status
  - added the optional property `request_id` to the response with the `401` status
  - added the optional property `request_id` to the response with the `403` status
  - added the optional property `request_id` to the response with the `404` status
  - added the optional property `request_id` to the response with the `409` status
  - added the optional property `request_id` to the response with the `500` status
  - added the optional property `type` to the response with the `400` status
  - added the optional property `type` to the response with the `401` status
  - added the optional property `type` to the response with the `403` status
  - added the optional property `type` to the response with the `404` status
  - added the optional property `type` to the response with the `409` status
  - added the optional property `type` to the response with the `500` status
- **2026-10-17** `140fba308073`: 1 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #9]/status`
- **2026-10-15** `b04239ad46c5`: 2 breaking, 2 info
  - removed `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5` from the `app_card/oneOf[subschema #2]/document/headerActions` request property `oneOf` list
  - removed `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5, subschema #6, subschema #7, subschema #8, subschema #9, subschema #10, subschema #11, subschema #12, subschema #13, subschema #14, subschema #15, subschema #16, subschema #17, subschema #18` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5` to the `app_card/oneOf[subschema #2]/document/headerActions` request property `oneOf` list
  - added `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5, subschema #6, subschema #7, subschema #8, subschema #9, subschema #10, subschema #11, subschema #12, subschema #13, subschema #14, subschema #15, subschema #16, subschema #17, subschema #18` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-13** `a1b7544d3bf4`: 3 info
  - added the new optional request property `send_at`
  - added the new `full` enum value to the request property `app_card/oneOf[subschema #2]/document/width`
  - added the success response with the status `202`
- **2026-10-12** `d386b4341e6a`: 1 breaking, 1 info
  - removed `subschema #4, subschema #5, subschema #18` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #4, subschema #5, subschema #18` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-10** `91b5b6814409`: 1 breaking, 1 info
  - removed `subschema #5, subschema #10` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #5, subschema #10, subschema #16` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-08** `5ad9173810c0`: 1 breaking, 1 info
  - removed `subschema #4, subschema #5, subschema #17` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #4, subschema #5, subschema #17` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-08** `85b4b3888d0d`: 2 breaking, 2 info
  - removed `subschema #3` from the `app_card/oneOf[subschema #2]/document/headerActions` request property `oneOf` list
  - removed `subschema #7, subschema #10` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #3, subschema #4` to the `app_card/oneOf[subschema #2]/document/headerActions` request property `oneOf` list
  - added `subschema #7, subschema #10` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-05** `9db8a5c7afb8`: 1 breaking, 1 info
  - removed `subschema #4, subschema #5, subschema #17` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #4, subschema #5, subschema #17` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-10-03** `c5d9fe685b8f`: 1 breaking, 2 info
  - removed `subschema #6, subschema #17` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #6, subschema #17` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added the optional property `data/forward_source/call_id` to the response with the `200` status
- **2026-10-01** `8b5b17687cd0`: 2 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #5]/items/items/caption`
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #5]/presentation`
- **2026-09-26** `3fd9240dfb9d`: 2 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #7]/oneOf[subschema #1]/items/items/count`
  - added the new optional request property `app_card/oneOf[subschema #2]/document/headerActions/oneOf[subschema #1]/items/items/count`
- **2026-09-24** `03367d93b6be`: 1 breaking, 3 info
  - removed `subschema #7, subschema #14` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added the new optional request property `app_card/oneOf[subschema #2]/document/headerActions/oneOf[subschema #1]/status`
  - the `app_card/oneOf[subschema #2]/document/title` request property's maxLength was increased from `500` to `2000`
  - added `subschema #7, subschema #14` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-09-23** `a72665a2748f`: 3 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/frame`
  - added `subschema #14` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added the optional property `data/forward_source` to the response with the `200` status
- **2026-09-22** `0e052a8b881e`: 2 info
  - added `subschema #2` to the `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #7]/` request property `oneOf` list
  - added `subschema #2` to the `app_card/oneOf[subschema #2]/document/headerActions` request property `oneOf` list
- **2026-09-15** `7f2488f4db4c`: 1 breaking, 1 info
  - removed `subschema #4, subschema #5, subschema #16` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #4, subschema #5, subschema #16` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-09-14** `4777a36ab1a9`: 2 info
  - added the optional property `data/call_id` to the response with the `200` status
  - added the required property `data/attachments` to the response with the `200` status
- **2026-09-12** `e4b95335db08`: 1 info
  - added `subschema #1` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-09-11** `be7b87a3cbbc`: 1 info
  - added the new optional request property `app_card/oneOf[subschema #2]/document/blocks/items/oneOf[subschema #15]/bodyStyle`
- **2026-09-10** `ff98b92174fc`: 1 breaking, 1 info
  - removed `subschema #3, subschema #4, subschema #15` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #3, subschema #4, subschema #15` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-09-09** `5a21b8f44a70`: 1 breaking, 1 info
  - removed `subschema #5, subschema #9, subschema #14` from the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
  - added `subschema #5, subschema #9, subschema #12, subschema #15` to the `app_card/oneOf[subschema #2]/document/blocks/items/` request property `oneOf` list
- **2026-09-07** `0b0da59eb0d1`: 1 breaking, 2 warning, 1 info
  - the `app_card` request property type changed from `object` to no type
  - removed the request property `app_card/deployment`
  - removed the request property `app_card/kind`
  - added `subschema #1, subschema #2` to the `app_card` request property `oneOf` list
- **2026-09-07** `48506611d15b`: 1 info
  - added the new optional request property `app_card`
- **2026-09-04** `2da0b5c6e637`: 1 info
  - added the new optional request property `file_ids`

---

[Operation](https://skmtc.dev/ando/apis/ando-public-api/docs/conversations/:conversationId/messages/post.md) - [API](https://skmtc.dev/ando/apis/ando-public-api.md) - [Page](https://skmtc.dev/ando/apis/ando-public-api/changes/conversations/:conversationId/messages/post)