---
title: "Download an attachment by signed link"
method: GET
path: "/v1/attachments/signed"
tags: ["mail"]
---

# Download an attachment by signed link

`GET /v1/attachments/signed`

## Request

- Base URL: `https://botmail.pro`
- URL: `https://botmail.pro/v1/attachments/signed`
- Auth: none required

No auth. `t` is a one-time token issued by the MCP `get_attachment`
tool; it expires after 5 minutes. 410 link_expired, 404 not found.

## Query parameters

- `t` string, required

## Response `200`

Attachment bytes with the stored Content-Type.

## Other responses

- `404`: Not found or not accessible with this credential.
- `410`: No longer available (expired link or claim).
- `413`: Too large (`message_too_large` over 10 MB, `attachment_too_large` over 25 MB).

---

[API](https://skmtc.dev/botmail/apis/botmail-api.md) · [All operations](https://skmtc.dev/botmail/apis/botmail-api/llms.txt) · [OpenAPI document](https://skmtc.dev/botmail/apis/botmail-api/revisions/49f736362bf2?raw)