---
title: "Changes to Send a mass message"
method: POST
path: "/chats/mass-messages"
---

# Changes to Send a mass message

`POST /chats/mass-messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 8 revisions.

- **2026-10-10** `79b9aba8a759`: 1 breaking, 3 info
- **2026-08-30** `dce5621fe589`: 2 info

## Changes

- **2026-10-10** `79b9aba8a759`: 1 breaking, 3 info
  - the response property `recipientCount` became nullable for the status `201`
  - added the new optional request property `excludedLists/dynamicSmartListUuids`
  - added the new optional request property `includedLists/dynamicSmartListUuids`
  - added the optional property `status` to the response with the `201` status
- **2026-08-30** `dce5621fe589`: 2 info
  - added the new optional `header` request parameter `Idempotency-Key`
  - added the non-success response with the status `409`

---

[Operation](https://skmtc.dev/fanvue/apis/fanvue-api/docs/chats/mass-messages/post.md) - [API](https://skmtc.dev/fanvue/apis/fanvue-api.md) - [Page](https://skmtc.dev/fanvue/apis/fanvue-api/changes/chats/mass-messages/post)