---
title: "Set System Broadcast"
method: POST
path: "/api/system-broadcast"
tags: ["System Broadcast"]
---

# Set System Broadcast

`POST /api/system-broadcast`

Set the platform-wide update warning. system_admin only.

The message is rendered to every logged-in user across all tenants, so it is
HTML-stripped (XSS convention) before storage; the frontend renders it as
plain text.

## Headers

- `x-api-token` string, nullable

## Request body

- UpdateWarningCreate
  - `message` string, required
  - `ttl_minutes` integer
  - `severity` string

## Response `200`

Successful Response

- unknown

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/multigest/apis/multigest-protected-api.md) · [All operations](https://skmtc.dev/multigest/apis/multigest-protected-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/multigest/multigest-protected-api/revisions/4b44eb76b3ee/schema)