---
title: "Changes to Atomically create group chat and send first message"
method: POST
path: "/v1/chat/rooms/with-message"
---

# Changes to Atomically create group chat and send first message

`POST /v1/chat/rooms/with-message`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 5 of 22 revisions.

- **2026-08-28** `792ac9f54322` — 1 info
- **2026-08-25** `f91fbc22fde3` — 27 info
- **2026-08-21** `9651975196e7` — 2 info
- **2026-08-16** `522e926825a5` — 5 info
- **2026-08-05** `c5a5175474ef` — 1 info

## Changes

- **2026-08-28** `792ac9f54322` — 1 info
  - added the optional property `message/quoted_post/anyOf[#/components/schemas/BasePost]/recap_content/anyOf[#/components/schemas/RecapContent]/translations` to the response with the `200` status
- **2026-08-25** `f91fbc22fde3` — 27 info
  - added the optional property `message/platform` to the response with the `200` status
  - added the required property `message/forwarded_from/anyOf[#/components/schemas/ForwardedFromMessage]/user/anyOf[#/components/schemas/PublicUser]/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/forwarded_from/anyOf[#/components/schemas/ForwardedFromMessage]/user/anyOf[#/components/schemas/PublicUser]/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/mentioned_users/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/mentioned_users/items/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/pinned_by/anyOf[#/components/schemas/PublicUser]/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/pinned_by/anyOf[#/components/schemas/PublicUser]/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/copiedUser/anyOf[#/components/schemas/PublicUser]/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/copiedUser/anyOf[#/components/schemas/PublicUser]/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/copiers/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/copiers/items/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/mentioned_users/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/mentioned_users/items/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/user/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/quoted_post/anyOf[#/components/schemas/BasePost]/user/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/mentioned_users/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/mentioned_users/items/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/user/anyOf[#/components/schemas/PublicUser]/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/user/anyOf[#/components/schemas/PublicUser]/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `message/user/anyOf[#/components/schemas/PublicUser]/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `message/user/anyOf[#/components/schemas/PublicUser]/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `room/lastMessage/anyOf[subschema #1]/mentioned_users/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `room/lastMessage/anyOf[subschema #1]/mentioned_users/items/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `room/otherMembers/items/user/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `room/otherMembers/items/user/fee_rebate_override_rate` to the response with the `200` status
  - added the required property `room/recentMessages/items/mentioned_users/items/clan_fee_rebate_rate` to the response with the `200` status
  - added the required property `room/recentMessages/items/mentioned_users/items/fee_rebate_override_rate` to the response with the `200` status
- **2026-08-21** `9651975196e7` — 2 info
  - added the optional property `message/link_preview/anyOf[#/components/schemas/LinkPreview]/isPlayable` to the response with the `200` status
  - added the optional property `message/quoted_post/anyOf[#/components/schemas/BasePost]/link_preview/anyOf[#/components/schemas/LinkPreview]/isPlayable` to the response with the `200` status
- **2026-08-16** `522e926825a5` — 5 info
  - added the optional property `message/mentioned_clans` to the response with the `200` status
  - added the optional property `message/quoted_post/anyOf[#/components/schemas/BasePost]/mentioned_clans` to the response with the `200` status
  - added the optional property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/mentioned_clans` to the response with the `200` status
  - added the optional property `room/lastMessage/anyOf[subschema #1]/mentioned_clans` to the response with the `200` status
  - added the optional property `room/recentMessages/items/mentioned_clans` to the response with the `200` status
- **2026-08-05** `c5a5175474ef` — 1 info
  - added the optional property `message/reply_to/anyOf[#/components/schemas/ReplyToMessage]/mentioned_users` to the response with the `200` status

---

[Operation](https://skmtc.dev/legend/apis/legend-api/docs/v1/chat/rooms/with-message/post.md) · [API](https://skmtc.dev/legend/apis/legend-api.md) · [Page](https://skmtc.dev/legend/apis/legend-api/changes/v1/chat/rooms/with-message/post)