---
title: "Seed"
method: POST
path: "/api/demo/{mailbox_id}/messages"
---

# Seed

`POST /api/demo/{mailbox_id}/messages`

## Request

- Base URL: `https://app.inboxmcp.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://app.inboxmcp.ai/api/demo/{mailbox_id}/messages`
- Auth: none declared

## Path parameters

- `mailbox_id` string, required

## Headers

- `authorization` string, nullable

## Request body

- DemoInput
  - `kind` 'important' | 'newsletter' | 'injection'
  - `external_id` string, required

## Response `201`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/inboxmcp/apis/emailconnect.md) · [All operations](https://skmtc.dev/inboxmcp/apis/emailconnect/llms.txt) · [OpenAPI document](https://skmtc.dev/inboxmcp/apis/emailconnect/revisions/b432f864d7c5?raw)