---
title: "Changes to Add a new message to the conversation in a specific service"
method: POST
path: "/v1/Services/{ChatServiceSid}/Conversations/{ConversationSid}/Messages"
---

# Changes to Add a new message to the conversation in a specific service

`POST /v1/Services/{ChatServiceSid}/Conversations/{ConversationSid}/Messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 51 revisions.

- **2025-07-03** (v1) `92d1169c37c2`: 2 breaking
- **2025-03-11** (v1) `b4d0e634cd69`: 2 breaking
- **2024-08-26** (v1) `5265b2a49bcb`: 1 info
- **2023-09-21** (v1) `bf66b70e986b`: 1 info
- **2023-08-10** (v1) `4e3f150aaa78`: 1 info

## Changes

- **2025-07-03** (v1) `92d1169c37c2`: 2 breaking
  - the `delivery` response's property type changed from `object` to no type for status `201`
  - the `media/items/` response's property type changed from `object` to no type for status `201`
- **2025-03-11** (v1) `b4d0e634cd69`: 2 breaking
  - the `delivery` response's property type changed from no type to `object` for status `201`
  - the `media/items/` response's property type changed from no type to `object` for status `201`
- **2024-08-26** (v1) `5265b2a49bcb`: 1 info
  - the `index` response's property default value `0` was added for the status `201`
- **2023-09-21** (v1) `bf66b70e986b`: 1 info
  - added the new optional request property `Subject`
- **2023-08-10** (v1) `4e3f150aaa78`: 1 info
  - api tag `ConversationsV1Message` added

---

[Operation](https://skmtc.dev/twilio/apis/conversations-v1/docs/v1/Services/:ChatServiceSid/Conversations/:ConversationSid/Messages/post.md) - [API](https://skmtc.dev/twilio/apis/conversations-v1.md) - [Page](https://skmtc.dev/twilio/apis/conversations-v1/changes/v1/Services/:ChatServiceSid/Conversations/:ConversationSid/Messages/post)