---
title: "POST /v1/{innovationId}/threads/{threadId}/messages"
method: POST
path: "/v1/{innovationId}/threads/{threadId}/messages"
tags: ["[v1] Innovation Threads"]
---

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

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

Creates a new message in a thread.

## Path parameters

- `innovationId` string, uuid, required
- `threadId` string, uuid, required

## Request body

- object
  - `message` string, required
  - `file` object
    - `name` string, required
    - `description` string
    - `file` object, required
      - `id` string, required
      - `name` string, required
      - `size` number, float, required
      - `extension` string, required

## Response `200`

Message created.

- object
  - `threadMessage` object, required
    - `createdBy` object
      - `id` string, uuid, required
      - `identityId` string, required
    - `id` string, uuid, required
    - `message` string, required
    - `isEditable` boolean, required
    - `createdAt` string, date-time, required

## Other responses

- `400` — Bad request.
- `401` — Unauthorized.
- `403` — Forbidden.
- `404` — Not found.
- `500` — Internal server error.

---

[API](https://skmtc.net/nhs-england/apis/innovations-api-nhs-innovation-service.md) · [All operations](https://skmtc.net/nhs-england/apis/innovations-api-nhs-innovation-service/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/nhs-england/innovations-api-nhs-innovation-service/revisions/36d432fb3b0d/schema)