---
title: "Public Reply To Thread"
method: POST
path: "/threads/{thread_id}/reply"
tags: ["Unibox"]
---

# Public Reply To Thread

`POST /threads/{thread_id}/reply`

## Request

- Base URL: `https://public.outreach2day.com`
- URL: `https://public.outreach2day.com/threads/{thread_id}/reply`
- Auth: HTTP bearer

Reply to a Unibox thread message.

## Path parameters

- `thread_id` string, required

## Query parameters

- `workspaceId` integer, required
- `deliveryMode` string, nullable

## Headers

- `Idempotency-Key` string, nullable
- `X-Client-Request-Id` string, nullable

## Request body

- UniboxPublicReplyIn: The published reply body: unknown fields are a client error.
  - `fromMailboxAddress` string, nullable
  - `message_id` union, required
    - string
    - integer
  - `body_text` string, required
  - `body_html` string, nullable
  - `schedule_time` string, nullable
  - `sent_to` string, nullable
  - `attachments` UniboxAttachmentIn[], nullable
    - `filename` string, required
    - `content` string, required
    - `contentType` string, nullable
  - `renderTemplates` boolean
  - `templateContext` object, nullable
  - `templateSeed` integer, nullable
  - `templateMode` string, nullable

## Response `200`

Successful Response

- UniboxReplyOut
  - `status` string, nullable
  - `message_id` union
    - integer
    - string
  - `task_hash` string, nullable
  - `operation_id` string, nullable
  - `idempotency_key` string, nullable
  - `estimated_finalization_s` integer, nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/outreach2day/apis/outreach-today-public-api.md) · [All operations](https://skmtc.dev/outreach2day/apis/outreach-today-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/outreach2day/apis/outreach-today-public-api/revisions/0e5471143371?raw)