---
title: "Send a new message in a sidebar"
method: POST
path: "/v1/conversations/{conversation_id}/sidebars/{sidebar_id}/update"
tags: ["Sidebars"]
---

# Send a new message in a sidebar

`POST /v1/conversations/{conversation_id}/sidebars/{sidebar_id}/update`

## Request

- Base URL: `https://api.atlas.so`
- URL: `https://api.atlas.so/v1/conversations/{conversation_id}/sidebars/{sidebar_id}/update`
- Auth: HTTP bearer

Send a new message in a sidebar

## Path parameters

- `conversation_id` string, uuid, required
- `sidebar_id` string, uuid, required

## Request body

- ExternalUpdateEmailSidebar
  - `agentEmail` string, email, required
  - `subject` string, required
  - `to` EmailAddress[], required
    - `name` string, nullable
    - `address` string, required
    - `inferredName` boolean
  - `cc` EmailAddress[], nullable
    - `name` string, nullable
    - `address` string, required
    - `inferredName` boolean
  - `body` string, required
  - `attachments` Attachment[], nullable
    - `name` string, required
    - `url` string, required
    - `handle` string, nullable
    - `size` integer, nullable
    - `contentId` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/atlas/apis/atlas-api.md) · [All operations](https://skmtc.dev/atlas/apis/atlas-api/llms.txt) · [OpenAPI document](https://skmtc.dev/atlas/apis/atlas-api/revisions/02fa610e5472?raw)