---
title: "Download Attachment"
method: GET
path: "/v1/attachments/{attachment_id}/download"
---

# Download Attachment

`GET /v1/attachments/{attachment_id}/download`

## Request

- Base URL: `https://www.tandem-cc.com` (the document declares no server; this is the origin it was published from)
- URL: `https://www.tandem-cc.com/v1/attachments/{attachment_id}/download`
- Auth: none declared

Stream an attachment's bytes — the web inbox's 📎 download link.

Same participant scoping as the fetch_attachment MCP verb: a bearer or
session caller must be a participant on the attachment's thread (or its
original uploader); admin is unrestricted. Serves with Content-
Disposition: attachment so the browser downloads rather than renders.

## Path parameters

- `attachment_id` string, required

## Headers

- `X-Tandem-Api-Key` string, nullable
- `Authorization` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/tandem-cc/apis/tandem-api.md) · [All operations](https://skmtc.dev/tandem-cc/apis/tandem-api/llms.txt) · [OpenAPI document](https://skmtc.dev/tandem-cc/apis/tandem-api/revisions/3b804877b47c?raw)