---
title: "Changes to POST /v1/{innovationId}/threads/{threadId}/messages"
method: POST
path: "/v1/{innovationId}/threads/{threadId}/messages"
---

# Changes to POST /v1/{innovationId}/threads/{threadId}/messages

`POST /v1/{innovationId}/threads/{threadId}/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 53 revisions.

- **2024-11-07** `761f95f46b23`: 3 breaking, 1 warning, 8 info

## Changes

- **2024-11-07** `761f95f46b23`: 3 breaking, 1 warning, 8 info
  - for the `path` request parameter `innovationId`, the format changed from no format to `uuid`
  - for the `path` request parameter `threadId`, the format changed from no format to `uuid`
  - the request property `message` became required
  - the `message` request property's maxLength was set to `4000`
  - added the new optional request property `file`
  - the response property `threadMessage` became required for the status `200`
  - the response property `threadMessage/createdAt` became required for the status `200`
  - the response property `threadMessage/createdBy/id` became required for the status `200`
  - the response property `threadMessage/createdBy/identityId` became required for the status `200`
  - the response property `threadMessage/id` became required for the status `200`
  - the response property `threadMessage/isEditable` became required for the status `200`
  - the response property `threadMessage/message` became required for the status `200`

---

[Operation](https://skmtc.dev/nhs-england/apis/innovations-api-nhs-innovation-service/docs/v1/:innovationId/threads/:threadId/messages/post.md) - [API](https://skmtc.dev/nhs-england/apis/innovations-api-nhs-innovation-service.md) - [Page](https://skmtc.dev/nhs-england/apis/innovations-api-nhs-innovation-service/changes/v1/:innovationId/threads/:threadId/messages/post)