---
title: "Reply to a support ticket."
method: POST
path: "/v1/support/tickets/{ticket_identifier}/messages"
tags: ["Support"]
---

# Reply to a support ticket.

`POST /v1/support/tickets/{ticket_identifier}/messages`

## Request

- Base URL: `https://api.mixpeek.com`
- URL: `https://api.mixpeek.com/v1/support/tickets/{ticket_identifier}/messages`
- Auth: HTTP bearer

## Path parameters

- `ticket_identifier` string, required

## Request body

- CreateMessageRequest
  - `body` string, required
  - `author_type` 'customer' | 'mixpeek': Who wrote a message — the customer or the Mixpeek team.
  - `attachments` SupportAttachment[]
    - `filename` string, required
    - `url` string, nullable
    - `storage_uri` string, nullable
    - `mime_type` string, nullable
    - `size_bytes` integer, nullable

## Response `200`

Successful Response

- MessageResponse
  - `message_id` string, required
  - `ticket_id` string, nullable
  - `organization_id` string, nullable
  - `author_type` 'customer' | 'mixpeek', required: Who wrote a message — the customer or the Mixpeek team.
  - `author` SupportActor: Lightweight snapshot of who created a ticket/message.
    - `user_id` string, nullable
    - `email` string, nullable
    - `name` string, nullable
  - `body` string, required
  - `attachments` SupportAttachment[]
    - `filename` string, required
    - `url` string, nullable
    - `storage_uri` string, nullable
    - `mime_type` string, nullable
    - `size_bytes` integer, nullable
  - `created_at` string, date-time, nullable

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `422`: Unprocessable Entity
- `429`: Too Many Requests
- `500`: Internal Server Error
- `503`: Service Unavailable

## Changes

- **2026-10-09** `61a175e8eb9a`: 1 warning, 5 info
  - removed the optional property `detail` from the response with the `422` status
  - added the non-success response with the status `429`
  - added the non-success response with the status `503`
  - added the optional property `success` to the response with the `422` status
  - …2 more
- **2026-08-09** `5d4c905106b4`: 1 info
  - the endpoint scheme security `BearerAuth` was added to the API

[Operation history](https://skmtc.dev/mixpeek/apis/mixpeek-api/changes/v1/support/tickets/:ticket_identifier/messages/post.md)

---

[API](https://skmtc.dev/mixpeek/apis/mixpeek-api.md) - [All operations](https://skmtc.dev/mixpeek/apis/mixpeek-api/llms.txt) - [OpenAPI document](https://skmtc.dev/mixpeek/apis/mixpeek-api/revisions/790bc16455f6?raw)